Developer Toolbox
511 browser-based tools for developers
Format JSON, decode JWTs, generate hashes, test regex patterns, convert timestamps, and move through everyday development work without sending private data to a server.
Live tools
The first batch is ready to use.
JSON Formatter
Format JSON with indentation, validation, and a copy-ready output.
JSON Minifier
Compress JSON into a compact one-line payload.
JSON Validator
Validate JSON syntax and pinpoint parsing errors.
JSON Tree Viewer
Explore JSON as an interactive expandable tree.
JSON Diff
Compare two JSON documents and highlight changes.
JSON Sort Keys
Sort JSON object keys recursively for deterministic output.
JSON Escape/Unescape
Escape or unescape JSON strings safely.
JSON to CSV
Convert JSON arrays into CSV tables.
JSON to YAML
Convert JSON payloads into YAML.
JSON to XML
Convert JSON data into XML markup.
JSON to TypeScript
Generate TypeScript interfaces from sample JSON.
JSON to Go Struct
Generate Go structs with JSON tags from sample JSON.
JSON to Python Dataclass
Generate Python dataclasses from JSON objects.
JSON to Java Class
Generate Java model classes from JSON data.
JSON to C# Class
Generate C# POCO classes from JSON payloads.
JSON to Kotlin Data Class
Generate Kotlin data classes from JSON.
JSON to Rust Struct
Generate Rust structs with serde annotations.
JSON Schema Generator
Create JSON Schema definitions from sample JSON.
JSON Schema Validator
Validate JSON documents against JSON Schema.
JSONPath Tester
Test JSONPath expressions against sample JSON.
Base64 Encode/Decode
Encode and decode Base64 strings locally in your browser.
URL Encode/Decode
Encode and decode URLs, query values, and reserved characters.
HTML Entity Encode/Decode
Convert text to and from HTML entities.
Hex Encode/Decode
Convert text and bytes to hexadecimal strings.
Unicode Escape Converter
Convert Unicode text to escaped sequences and back.
JWT Decoder
Decode JWT headers and payloads without sending tokens to a server.
JWT Verifier
Verify HS256, HS384, and HS512 JWT signatures with a shared secret.
QR Code Generator
Generate browser-local SVG QR codes from short text and URLs.
QR Code Reader
Read short QR codes from UnixConvert SVG or SVG data URI output.
Image to Base64
Convert images into Base64 data URIs.
Case Converter
Convert text between title, camel, pascal, snake, kebab, and uppercase forms.
Word Counter
Count words, characters, sentences, and reading time.
Character Counter
Count characters, bytes, and visible text length.
Text Diff
Compare two text snippets line by line.
Line Sorter
Sort text lines alphabetically or numerically.
Duplicate Line Remover
Remove duplicate lines while preserving useful order.
Whitespace Cleaner
Trim and normalize whitespace in pasted text.
Slug Generator
Create URL-safe slugs from titles and phrases.
Lorem Ipsum Generator
Generate placeholder paragraphs, sentences, and words.
Markdown Previewer
Preview Markdown as rendered HTML.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes.
SHA256 Generator
Generate SHA-256 digests from text.
MD5 Generator
Generate MD5 hashes for legacy checksums.
HMAC Generator
Create HMAC signatures from a secret key.
Password Generator
Generate strong passwords with configurable length and character sets.
UUID Generator
Generate UUID v4 identifiers in bulk.
ULID Generator
Generate sortable ULID identifiers.
Bcrypt Generator/Verifier
Generate and verify bcrypt password hashes.
RSA Key Pair Generator
Generate RSA key pairs in PEM format.
Random Token Generator
Generate secure random tokens for apps and APIs.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back.
Timezone Converter
Convert a date and time between common timezones.
Date Calculator
Add or subtract days, months, and years from dates.
Duration Calculator
Calculate exact duration between two dates.
ISO 8601 Parser
Parse and validate ISO 8601 date strings.
Cron Expression Builder
Build cron expressions with a human-readable summary.
Cron Next Runs Preview
Preview upcoming run times for cron expressions.
Relative Time Generator
Generate relative labels like yesterday or in 3 hours.
World Clock
Compare live times across multiple cities.
Date Range Generator
Generate date ranges for testing and reporting.
cURL Parser
Parse cURL commands into method, URL, headers, and body.
cURL to JavaScript
Convert cURL commands into fetch snippets.
cURL to Python
Convert cURL commands into Python requests snippets.
HTTP Status Code Lookup
Look up HTTP status codes and meanings.
HTTP Header Parser
Parse HTTP headers into structured key-value pairs.
User-Agent Parser
Inspect browser, OS, and device data from user-agent strings.
URL Parser
Break URLs into protocol, host, path, query, and hash parts.
Query String Parser
Parse and edit query strings.
API Request Builder
Build and test HTTP requests from the browser.
WebSocket Tester
Connect to WebSocket endpoints and inspect messages.
HTML Formatter
Beautify HTML markup.
CSS Formatter
Beautify CSS stylesheets.
JavaScript Formatter
Beautify JavaScript code.
TypeScript Formatter
Beautify TypeScript code.
SQL Formatter
Format SQL queries for readability.
XML Formatter
Beautify XML documents.
YAML Formatter
Format YAML configuration files.
Markdown Formatter
Normalize Markdown documents.
JavaScript Minifier
Minify JavaScript code.
CSS Minifier
Minify CSS stylesheets.
Color Converter
Convert colors between HEX, RGB, HSL, and CSS names.
Color Contrast Checker
Check WCAG contrast ratios between foreground and background colors.
Gradient Generator
Generate CSS gradients visually.
CSS Box Shadow Generator
Generate CSS box-shadow values.
Border Radius Generator
Generate CSS border-radius values visually.
CSS Unit Converter
Convert px, rem, em, vh, vw, and percentages.
Flexbox Generator
Create CSS flexbox layouts visually.
Grid Generator
Create CSS grid layouts visually.
Tailwind Class Helper
Search and compose Tailwind utility classes.
SVG Optimizer
Optimize SVG markup for production.
Regex Tester
Test regular expressions with live matches and flags.
Regex Explainer
Explain regular expression patterns in plain language.
Gitignore Generator
Generate .gitignore files for common stacks.
Chmod Calculator
Convert Unix file permissions between symbolic and octal forms.
MIME Type Lookup
Find MIME types by extension or content type.
IP Subnet Calculator
Calculate CIDR ranges, hosts, and masks.
DNS Lookup
Look up DNS records for domains.
OpenAPI Viewer
Preview OpenAPI and Swagger documents.
GraphQL Query Formatter
Format GraphQL queries and mutations.
README Generator
Generate project README sections and badges.
CSV to JSON Converter
Use csv to json converter online in a fast, private, browser-based developer workflow.
TSV to JSON Converter
Use tsv to json converter online in a fast, private, browser-based developer workflow.
NDJSON Formatter
Use ndjson formatter online in a fast, private, browser-based developer workflow.
NDJSON to JSON Converter
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JSON to NDJSON Converter
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JSON Lines Validator
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JSON Array Flattener
Use json array flattener online in a fast, private, browser-based developer workflow.
JSON Object Unflattener
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JSON Key Finder
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JSON Value Extractor
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JSON Property Counter
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JSON Size Analyzer
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JSON Duplicate Key Detector
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JSON Merge Tool
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JSON Patch Generator
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JSON Patch Applier
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JSON Pointer Tester
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JSON Query Builder
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JSON Sample Generator
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JSON Mock Data Generator
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JSON Pretty Printer
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JSON Compact Viewer
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JSON Path Extractor
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JSON Key Renamer
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JSON Field Filter
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JSON Array Sorter
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JSON Array Grouper
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JSON to HTML Table
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JSON to Markdown Table
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JSON to Excel Preview
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JSON to SQL Insert
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JSON to SQL Update
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JSON to GraphQL Query
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GraphQL Response to JSON
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JSON API Response Formatter
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Package JSON Viewer
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Package Lock JSON Viewer
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TSConfig JSON Viewer
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ESLint Config JSON Viewer
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Prettier Config JSON Viewer
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JSON to Zod Schema
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JSON to Prisma Model
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JSON to Mongoose Schema
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JSON to GraphQL Type
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JSON to Protobuf Message
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JSON to Avro Schema
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JSON to BigQuery Schema
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JSON to PostgreSQL Table
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JSON to MySQL Table
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JSON to SQLite Table
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JSON to Dart Model
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JSON to Swift Struct
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JSON to Objective C Model
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JSON to PHP Class
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JSON to Ruby Class
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JSON to Scala Case Class
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JSON to Elixir Struct
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JSON to C Struct
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JSON to C Plus Plus Struct
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JSON to TypeBox Schema
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JSON to Joi Schema
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JSON to Yup Schema
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JSON to Valibot Schema
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JSON to OpenAPI Schema
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JSON to AsyncAPI Schema
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JSON to Terraform Variables
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JSON to Kubernetes ConfigMap
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JSON to Helm Values
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JSON to Env File
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JSON to TOML
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TypeScript to JSON Schema
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Zod to JSON Schema
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OpenAPI to TypeScript
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OpenAPI to Markdown
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GraphQL Schema to TypeScript
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GraphQL Schema to JSON
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Prisma Schema Formatter
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Protobuf Formatter
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Avro Schema Validator
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BigQuery Schema Formatter
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Base32 Encode Decode
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Base58 Encode Decode
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Base85 Encode Decode
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Binary Encode Decode
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Morse Code Translator
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Punycode Converter
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ROT13 Converter
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Caesar Cipher Tool
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Vigenere Cipher Tool
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Ascii85 Converter
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Text to Binary Converter
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Binary to Text Converter
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Text to Octal Converter
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Octal to Text Converter
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Text to ASCII Codes
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ASCII Codes to Text
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Decimal to ASCII Converter
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URI Component Encoder
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URI Component Decoder
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Query Parameter Encoder
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Query Parameter Decoder
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CSV Escape Tool
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SQL String Escape Tool
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JavaScript String Escape Tool
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CSS String Escape Tool
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XML Escape Unescape
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LDAP Escape Tool
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Shell Argument Escape Tool
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Regular Expression Escape Tool
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Data URI Encoder
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Data URI Decoder
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SVG to Data URI
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Data URI to File Info
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Percent Encoding Table
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UTF8 Byte Inspector
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UTF16 Code Unit Inspector
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Emoji Unicode Inspector
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IDN Domain Converter
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HTML to Plain Text Converter
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Plain Text to HTML Converter
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Sentence Counter
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Paragraph Counter
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Reading Time Calculator
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Keyword Density Checker
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Text Reverser
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Text Shuffler
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Text Splitter
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Text Joiner
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Comma List to Lines
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Lines to Comma List
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CSV Column Extractor
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Find and Replace Tool
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Regex Replace Tool
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Prefix Suffix Lines
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Number Lines Tool
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Remove Empty Lines
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Trim Lines Tool
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Normalize Line Endings
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Tabs to Spaces
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Spaces to Tabs
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Text Deduplicator
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Text Frequency Analyzer
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N Gram Analyzer
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Stop Words Remover
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Accents Remover
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Diacritics Remover
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Smart Quotes Converter
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Markdown to HTML
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HTML to Markdown
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Markdown Table Formatter
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Markdown Link Extractor
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Markdown TOC Generator
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CSV Viewer
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CSV Formatter
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CSV Validator
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CSV Sort by Column
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CSV Filter Rows
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CSV Dedupe Rows
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TSV Viewer
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Log File Highlighter
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SHA1 Generator
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SHA224 Generator
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SHA384 Generator
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SHA512 Generator
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SHA3 Generator
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Keccak Hash Generator
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RIPEMD160 Generator
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CRC32 Checksum Generator
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Adler32 Checksum Generator
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File Hash Generator
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PBKDF2 Generator
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Scrypt Key Derivation
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Argon2 Hash Generator
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AES Encrypt Decrypt
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DES Encrypt Decrypt
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Triple DES Encrypt Decrypt
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ChaCha20 Encrypt Decrypt
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RSA Encrypt Decrypt
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RSA Signature Verifier
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ECDSA Signature Verifier
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Ed25519 Key Generator
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PEM Parser
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JWK Converter
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JWKS Viewer
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CSR Generator
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CSR Decoder
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Certificate Decoder
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SSL Certificate Checker
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Certificate Fingerprint Generator
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Public Key Extractor
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Private Key Validator
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Password Entropy Calculator
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Password Strength Checker
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Passphrase Generator
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TOTP Code Generator
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TOTP Secret Generator
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OTP URI Parser
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OAuth Token Inspector
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SAML Response Decoder
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CSP Hash Generator
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Business Day Calculator
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Work Hours Calculator
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Age Calculator
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Week Number Calculator
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Day of Year Calculator
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Leap Year Checker
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ISO Week Converter
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RFC 2822 Date Parser
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Date Format Converter
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Date Format Tester
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Timezone Abbreviation Lookup
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Timezone Meeting Planner
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DST Checker
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UTC Offset Converter
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Epoch Milliseconds Converter
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Epoch Microseconds Converter
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Epoch Nanoseconds Converter
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Snowflake ID Timestamp Decoder
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Mongo ObjectId Timestamp Decoder
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ULID Timestamp Decoder
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KSUID Timestamp Decoder
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Cron Parser
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Crontab Validator
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Quartz Cron Builder
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Systemd Timer Builder
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iCal RRULE Builder
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RRULE Text Explainer
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Calendar Link Generator
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Countdown Timer Generator
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Uptime Calculator
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SLA Uptime Calculator
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Time Duration Formatter
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Milliseconds to Duration
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Duration to Milliseconds
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Time Ago Calculator
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Future Time Calculator
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Timezone Offset Table
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Unix Time Range Generator
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Fiscal Quarter Calculator
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Holiday Date Calculator
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HTTP Method Reference
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HTTP Cache Header Builder
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Cache Control Parser
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CORS Header Builder
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CORS Preflight Tester
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Content Security Policy Builder
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CSP Analyzer
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Permissions Policy Builder
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Referrer Policy Builder
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Robots Txt Generator
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Robots Txt Tester
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Sitemap XML Generator
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Sitemap XML Validator
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Meta Tags Generator
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Open Graph Previewer
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Open Graph URL Fetcher
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Twitter Card Previewer
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Canonical URL Generator
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Hreflang Tag Generator
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Schema Markup Generator
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Structured Data Validator
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JSON LD Formatter
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Link Header Parser
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Cookie Parser
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Set Cookie Header Builder
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HAR Viewer
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HTTP Request Raw Parser
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HTTP Response Raw Parser
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Webhook Payload Formatter
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Webhook Signature Verifier
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Slack Webhook Builder
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Discord Webhook Builder
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Stripe Webhook Verifier
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GitHub Webhook Verifier
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OpenAPI JSON Formatter
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OpenAPI YAML Formatter
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OpenAPI Diff Tool
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Postman Collection Viewer
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Postman to OpenAPI Converter
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GraphQL Variables Formatter
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GraphQL Introspection Viewer
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HTML Minifier
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XML Minifier
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YAML Minifier
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SQL Minifier
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GraphQL Formatter
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GraphQL Minifier
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Dockerfile Formatter
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Docker Compose Formatter
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Terraform Formatter
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HCL Formatter
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INI Formatter
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TOML Formatter
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Properties File Formatter
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Env File Formatter
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Nginx Config Formatter
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Apache Config Formatter
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EditorConfig Formatter
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Prettier Config Formatter
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ESLint Config Formatter
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Babel Config Formatter
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Webpack Config Formatter
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Vite Config Formatter
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Package JSON Formatter
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Lockfile Viewer
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Diff Patch Formatter
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Unified Diff Viewer
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Log Formatter
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Stack Trace Formatter
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Java Formatter
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Python Formatter
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PHP Formatter
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Ruby Formatter
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Go Formatter
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Rust Formatter
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C Formatter
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C Plus Plus Formatter
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C Sharp Formatter
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Kotlin Formatter
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Swift Formatter
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Dart Formatter
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CSS Clamp Generator
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Fluid Typography Generator
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CSS Specificity Calculator
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CSS Selector Tester
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CSS Animation Generator
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CSS Transition Generator
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CSS Transform Generator
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CSS Filter Generator
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Backdrop Filter Generator
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Clip Path Generator
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Cubic Bezier Generator
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Easing Function Previewer
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CSS Triangle Generator
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CSS Ribbon Generator
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CSS Loading Spinner Generator
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Button CSS Generator
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Glassmorphism Generator
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Neumorphism Generator
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Favicon Generator
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App Icon Generator
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PWA Manifest Generator
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Meta Theme Color Previewer
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Viewport Meta Tag Generator
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Responsive Breakpoint Previewer
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Aspect Ratio Calculator
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Image Aspect Ratio Cropper
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REM PX Converter
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Viewport Unit Converter
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Tailwind Color Converter
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Tailwind Palette Generator
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Tailwind Gradient Generator
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Tailwind Shadow Generator
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Tailwind Spacing Converter
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CSS Variables Extractor
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CSS Variables Generator
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SVG Sprite Generator
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SVG Path Viewer
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SVG Stroke Dasharray Generator
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Icon Size Calculator
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Web Font CSS Generator
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Git Command Builder
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Git Commit Message Generator
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Conventional Commit Builder
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Semver Comparator
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Semver Bump Calculator
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NPM Package Name Checker
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Package Version Comparator
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Package JSON Script Viewer
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Dependency List Formatter
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NPM Install Command Builder
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Package Manager Command Converter
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Package Version Range Explainer
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Docker Run Command Builder
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Docker Compose Port Mapper
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Kubernetes YAML Validator
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Kubernetes Resource Calculator
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Helm Values Viewer
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Env Var Diff Tool
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Dotenv Validator
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Makefile Target Viewer
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CI YAML Validator
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GitHub Actions Workflow Validator
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GitLab CI Validator
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Markdown Badge Generator
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License Picker
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SPDX License Lookup
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Changelog Generator
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API Changelog Formatter
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Release Notes Generator
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Feature Flag Matrix Builder
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A B Test Sample Size Calculator
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Latency Percentile Calculator
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Rate Limit Calculator
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Backoff Calculator
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Retry Schedule Generator
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Port Availability Checker
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CIDR Range Splitter
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CIDR Merge Helper
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IPv4 Converter
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IPv6 Converter
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MAC Address Formatter
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DNS Record Formatter
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DNS Zone File Formatter
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Hostname Validator
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URL Redirect Chain Parser
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UUID Validator
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ULID Validator
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Nano ID Generator
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Mock API Response Generator
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Test Data Generator
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JSON Tools
Format, validate, compare, and convert JSON payloads.
JSON Formatter
Format JSON with indentation, validation, and a copy-ready output.
JSON Minifier
Compress JSON into a compact one-line payload.
JSON Validator
Validate JSON syntax and pinpoint parsing errors.
JSON Tree Viewer
Explore JSON as an interactive expandable tree.
JSON Diff
Compare two JSON documents and highlight changes.
JSON Sort Keys
Sort JSON object keys recursively for deterministic output.
JSON Escape/Unescape
Escape or unescape JSON strings safely.
JSON to CSV
Convert JSON arrays into CSV tables.
JSON to YAML
Convert JSON payloads into YAML.
JSON to XML
Convert JSON data into XML markup.
CSV to JSON Converter
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TSV to JSON Converter
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NDJSON Formatter
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NDJSON to JSON Converter
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JSON to NDJSON Converter
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JSON Lines Validator
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JSON Array Flattener
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JSON Object Unflattener
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JSON Key Finder
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JSON Value Extractor
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JSON Property Counter
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JSON Size Analyzer
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JSON Duplicate Key Detector
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JSON Merge Tool
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JSON Patch Generator
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JSON Patch Applier
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JSON Pointer Tester
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JSON Query Builder
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JSON Sample Generator
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JSON Mock Data Generator
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JSON Pretty Printer
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JSON Compact Viewer
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JSON Path Extractor
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JSON Key Renamer
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JSON Field Filter
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JSON Array Sorter
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JSON Array Grouper
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JSON to HTML Table
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JSON to Markdown Table
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JSON to Excel Preview
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JSON to SQL Insert
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JSON to SQL Update
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JSON to GraphQL Query
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GraphQL Response to JSON
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JSON API Response Formatter
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Package JSON Viewer
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Package Lock JSON Viewer
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TSConfig JSON Viewer
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ESLint Config JSON Viewer
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Prettier Config JSON Viewer
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JSON Code Generators
Generate typed models, schemas, and language-specific code from JSON.
JSON to TypeScript
Generate TypeScript interfaces from sample JSON.
JSON to Go Struct
Generate Go structs with JSON tags from sample JSON.
JSON to Python Dataclass
Generate Python dataclasses from JSON objects.
JSON to Java Class
Generate Java model classes from JSON data.
JSON to C# Class
Generate C# POCO classes from JSON payloads.
JSON to Kotlin Data Class
Generate Kotlin data classes from JSON.
JSON to Rust Struct
Generate Rust structs with serde annotations.
JSON Schema Generator
Create JSON Schema definitions from sample JSON.
JSON Schema Validator
Validate JSON documents against JSON Schema.
JSONPath Tester
Test JSONPath expressions against sample JSON.
JSON to Zod Schema
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JSON to Prisma Model
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JSON to Mongoose Schema
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JSON to GraphQL Type
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JSON to Protobuf Message
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JSON to Avro Schema
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JSON to BigQuery Schema
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JSON to PostgreSQL Table
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JSON to MySQL Table
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JSON to SQLite Table
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JSON to Dart Model
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JSON to Swift Struct
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JSON to Objective C Model
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JSON to PHP Class
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JSON to Ruby Class
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JSON to Scala Case Class
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JSON to Elixir Struct
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JSON to C Struct
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JSON to C Plus Plus Struct
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JSON to TypeBox Schema
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JSON to Joi Schema
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JSON to Yup Schema
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JSON to Valibot Schema
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JSON to OpenAPI Schema
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JSON to AsyncAPI Schema
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JSON to Terraform Variables
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JSON to Kubernetes ConfigMap
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JSON to Helm Values
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JSON to Env File
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JSON to TOML
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TypeScript to JSON Schema
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Zod to JSON Schema
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OpenAPI to TypeScript
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OpenAPI to Markdown
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GraphQL Schema to TypeScript
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GraphQL Schema to JSON
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Prisma Schema Formatter
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Protobuf Formatter
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Avro Schema Validator
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BigQuery Schema Formatter
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Encoders & Decoders
Encode, decode, inspect, and transform common web-safe formats.
Base64 Encode/Decode
Encode and decode Base64 strings locally in your browser.
URL Encode/Decode
Encode and decode URLs, query values, and reserved characters.
HTML Entity Encode/Decode
Convert text to and from HTML entities.
Hex Encode/Decode
Convert text and bytes to hexadecimal strings.
Unicode Escape Converter
Convert Unicode text to escaped sequences and back.
JWT Decoder
Decode JWT headers and payloads without sending tokens to a server.
JWT Verifier
Verify HS256, HS384, and HS512 JWT signatures with a shared secret.
QR Code Generator
Generate browser-local SVG QR codes from short text and URLs.
QR Code Reader
Read short QR codes from UnixConvert SVG or SVG data URI output.
Image to Base64
Convert images into Base64 data URIs.
Base32 Encode Decode
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Base58 Encode Decode
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Base85 Encode Decode
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Binary Encode Decode
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Morse Code Translator
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Punycode Converter
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ROT13 Converter
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Caesar Cipher Tool
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Vigenere Cipher Tool
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Ascii85 Converter
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Text to Binary Converter
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Binary to Text Converter
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Text to Octal Converter
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Octal to Text Converter
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Text to ASCII Codes
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ASCII Codes to Text
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Decimal to ASCII Converter
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URI Component Encoder
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URI Component Decoder
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Query Parameter Encoder
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Query Parameter Decoder
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CSV Escape Tool
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SQL String Escape Tool
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JavaScript String Escape Tool
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CSS String Escape Tool
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XML Escape Unescape
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LDAP Escape Tool
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Shell Argument Escape Tool
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Regular Expression Escape Tool
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Data URI Encoder
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Data URI Decoder
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SVG to Data URI
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Data URI to File Info
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Percent Encoding Table
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UTF8 Byte Inspector
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UTF16 Code Unit Inspector
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Emoji Unicode Inspector
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IDN Domain Converter
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HTML to Plain Text Converter
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Plain Text to HTML Converter
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Text Tools
Clean, compare, count, and reshape text for everyday workflows.
Case Converter
Convert text between title, camel, pascal, snake, kebab, and uppercase forms.
Word Counter
Count words, characters, sentences, and reading time.
Character Counter
Count characters, bytes, and visible text length.
Text Diff
Compare two text snippets line by line.
Line Sorter
Sort text lines alphabetically or numerically.
Duplicate Line Remover
Remove duplicate lines while preserving useful order.
Whitespace Cleaner
Trim and normalize whitespace in pasted text.
Slug Generator
Create URL-safe slugs from titles and phrases.
Lorem Ipsum Generator
Generate placeholder paragraphs, sentences, and words.
Markdown Previewer
Preview Markdown as rendered HTML.
Sentence Counter
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Paragraph Counter
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Reading Time Calculator
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Keyword Density Checker
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Text Reverser
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Text Shuffler
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Text Splitter
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Text Joiner
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Comma List to Lines
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Lines to Comma List
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CSV Column Extractor
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Find and Replace Tool
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Regex Replace Tool
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Prefix Suffix Lines
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Number Lines Tool
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Remove Empty Lines
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Trim Lines Tool
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Normalize Line Endings
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Tabs to Spaces
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Spaces to Tabs
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Text Deduplicator
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Text Frequency Analyzer
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N Gram Analyzer
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Stop Words Remover
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Accents Remover
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Diacritics Remover
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Smart Quotes Converter
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Markdown to HTML
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HTML to Markdown
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Markdown Table Formatter
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Markdown Link Extractor
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Markdown TOC Generator
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CSV Viewer
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CSV Formatter
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CSV Validator
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CSV Sort by Column
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CSV Filter Rows
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CSV Dedupe Rows
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TSV Viewer
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Log File Highlighter
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Security & Hashing
Generate hashes, passwords, identifiers, and local crypto helpers.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes.
SHA256 Generator
Generate SHA-256 digests from text.
MD5 Generator
Generate MD5 hashes for legacy checksums.
HMAC Generator
Create HMAC signatures from a secret key.
Password Generator
Generate strong passwords with configurable length and character sets.
UUID Generator
Generate UUID v4 identifiers in bulk.
ULID Generator
Generate sortable ULID identifiers.
Bcrypt Generator/Verifier
Generate and verify bcrypt password hashes.
RSA Key Pair Generator
Generate RSA key pairs in PEM format.
Random Token Generator
Generate secure random tokens for apps and APIs.
SHA1 Generator
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SHA224 Generator
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SHA384 Generator
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SHA512 Generator
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SHA3 Generator
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Keccak Hash Generator
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RIPEMD160 Generator
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CRC32 Checksum Generator
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Adler32 Checksum Generator
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File Hash Generator
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PBKDF2 Generator
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Scrypt Key Derivation
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Argon2 Hash Generator
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AES Encrypt Decrypt
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DES Encrypt Decrypt
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Triple DES Encrypt Decrypt
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ChaCha20 Encrypt Decrypt
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RSA Encrypt Decrypt
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RSA Signature Verifier
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ECDSA Signature Verifier
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Ed25519 Key Generator
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PEM Parser
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JWK Converter
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JWKS Viewer
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CSR Generator
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CSR Decoder
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Certificate Decoder
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SSL Certificate Checker
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Certificate Fingerprint Generator
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Public Key Extractor
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Private Key Validator
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Password Entropy Calculator
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Password Strength Checker
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Passphrase Generator
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TOTP Code Generator
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TOTP Secret Generator
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OTP URI Parser
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OAuth Token Inspector
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SAML Response Decoder
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CSP Hash Generator
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Date & Time
Convert timestamps, timezones, dates, durations, and cron schedules.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back.
Timezone Converter
Convert a date and time between common timezones.
Date Calculator
Add or subtract days, months, and years from dates.
Duration Calculator
Calculate exact duration between two dates.
ISO 8601 Parser
Parse and validate ISO 8601 date strings.
Cron Expression Builder
Build cron expressions with a human-readable summary.
Cron Next Runs Preview
Preview upcoming run times for cron expressions.
Relative Time Generator
Generate relative labels like yesterday or in 3 hours.
World Clock
Compare live times across multiple cities.
Date Range Generator
Generate date ranges for testing and reporting.
Business Day Calculator
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Work Hours Calculator
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Age Calculator
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Week Number Calculator
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Day of Year Calculator
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Leap Year Checker
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ISO Week Converter
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RFC 2822 Date Parser
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Date Format Converter
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Date Format Tester
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Timezone Abbreviation Lookup
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Timezone Meeting Planner
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DST Checker
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UTC Offset Converter
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Epoch Milliseconds Converter
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Epoch Microseconds Converter
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Epoch Nanoseconds Converter
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Snowflake ID Timestamp Decoder
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Mongo ObjectId Timestamp Decoder
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ULID Timestamp Decoder
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KSUID Timestamp Decoder
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Cron Parser
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Crontab Validator
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Quartz Cron Builder
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Systemd Timer Builder
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iCal RRULE Builder
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RRULE Text Explainer
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Calendar Link Generator
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Countdown Timer Generator
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Uptime Calculator
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SLA Uptime Calculator
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Time Duration Formatter
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Milliseconds to Duration
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Duration to Milliseconds
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Time Ago Calculator
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Future Time Calculator
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Timezone Offset Table
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Unix Time Range Generator
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Fiscal Quarter Calculator
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Holiday Date Calculator
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Web & API
Inspect requests, headers, URLs, user agents, and API payloads.
cURL Parser
Parse cURL commands into method, URL, headers, and body.
cURL to JavaScript
Convert cURL commands into fetch snippets.
cURL to Python
Convert cURL commands into Python requests snippets.
HTTP Status Code Lookup
Look up HTTP status codes and meanings.
HTTP Header Parser
Parse HTTP headers into structured key-value pairs.
User-Agent Parser
Inspect browser, OS, and device data from user-agent strings.
URL Parser
Break URLs into protocol, host, path, query, and hash parts.
Query String Parser
Parse and edit query strings.
API Request Builder
Build and test HTTP requests from the browser.
WebSocket Tester
Connect to WebSocket endpoints and inspect messages.
HTTP Method Reference
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HTTP Cache Header Builder
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Cache Control Parser
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CORS Header Builder
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CORS Preflight Tester
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Content Security Policy Builder
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CSP Analyzer
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Permissions Policy Builder
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Referrer Policy Builder
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Robots Txt Generator
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Robots Txt Tester
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Sitemap XML Generator
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Sitemap XML Validator
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Meta Tags Generator
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Open Graph Previewer
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Open Graph URL Fetcher
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Twitter Card Previewer
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Canonical URL Generator
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Hreflang Tag Generator
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Schema Markup Generator
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Structured Data Validator
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JSON LD Formatter
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Link Header Parser
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Cookie Parser
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Set Cookie Header Builder
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HAR Viewer
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HTTP Request Raw Parser
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HTTP Response Raw Parser
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Webhook Payload Formatter
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Webhook Signature Verifier
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Slack Webhook Builder
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Discord Webhook Builder
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Stripe Webhook Verifier
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GitHub Webhook Verifier
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OpenAPI JSON Formatter
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OpenAPI YAML Formatter
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OpenAPI Diff Tool
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Postman Collection Viewer
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Postman to OpenAPI Converter
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GraphQL Variables Formatter
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GraphQL Introspection Viewer
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Code Formatters
Beautify and minify common code, markup, and data languages.
HTML Formatter
Beautify HTML markup.
CSS Formatter
Beautify CSS stylesheets.
JavaScript Formatter
Beautify JavaScript code.
TypeScript Formatter
Beautify TypeScript code.
SQL Formatter
Format SQL queries for readability.
XML Formatter
Beautify XML documents.
YAML Formatter
Format YAML configuration files.
Markdown Formatter
Normalize Markdown documents.
JavaScript Minifier
Minify JavaScript code.
CSS Minifier
Minify CSS stylesheets.
HTML Minifier
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XML Minifier
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YAML Minifier
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SQL Minifier
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GraphQL Formatter
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GraphQL Minifier
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Dockerfile Formatter
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Docker Compose Formatter
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Terraform Formatter
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HCL Formatter
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INI Formatter
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TOML Formatter
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Properties File Formatter
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Env File Formatter
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Nginx Config Formatter
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Apache Config Formatter
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EditorConfig Formatter
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Prettier Config Formatter
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ESLint Config Formatter
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Babel Config Formatter
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Webpack Config Formatter
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Vite Config Formatter
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Package JSON Formatter
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Lockfile Viewer
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Diff Patch Formatter
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Unified Diff Viewer
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Log Formatter
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Stack Trace Formatter
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Java Formatter
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Python Formatter
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PHP Formatter
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Ruby Formatter
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Go Formatter
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Rust Formatter
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C Formatter
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C Plus Plus Formatter
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C Sharp Formatter
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Kotlin Formatter
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Swift Formatter
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Dart Formatter
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Frontend Design
Generate colors, CSS utilities, layouts, and frontend snippets.
Color Converter
Convert colors between HEX, RGB, HSL, and CSS names.
Color Contrast Checker
Check WCAG contrast ratios between foreground and background colors.
Gradient Generator
Generate CSS gradients visually.
CSS Box Shadow Generator
Generate CSS box-shadow values.
Border Radius Generator
Generate CSS border-radius values visually.
CSS Unit Converter
Convert px, rem, em, vh, vw, and percentages.
Flexbox Generator
Create CSS flexbox layouts visually.
Grid Generator
Create CSS grid layouts visually.
Tailwind Class Helper
Search and compose Tailwind utility classes.
SVG Optimizer
Optimize SVG markup for production.
CSS Clamp Generator
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Fluid Typography Generator
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CSS Specificity Calculator
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CSS Selector Tester
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CSS Animation Generator
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CSS Transition Generator
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CSS Transform Generator
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CSS Filter Generator
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Backdrop Filter Generator
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Clip Path Generator
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Cubic Bezier Generator
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Easing Function Previewer
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CSS Triangle Generator
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CSS Ribbon Generator
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CSS Loading Spinner Generator
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Button CSS Generator
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Glassmorphism Generator
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Neumorphism Generator
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Favicon Generator
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App Icon Generator
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PWA Manifest Generator
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Meta Theme Color Previewer
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Viewport Meta Tag Generator
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Responsive Breakpoint Previewer
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Aspect Ratio Calculator
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Image Aspect Ratio Cropper
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REM PX Converter
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Viewport Unit Converter
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Tailwind Color Converter
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Tailwind Palette Generator
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Tailwind Gradient Generator
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Tailwind Shadow Generator
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Tailwind Spacing Converter
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CSS Variables Extractor
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CSS Variables Generator
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SVG Sprite Generator
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SVG Path Viewer
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SVG Stroke Dasharray Generator
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Icon Size Calculator
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Web Font CSS Generator
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Developer Utilities
Practical helpers for regex, Git, network math, docs, and specs.
Regex Tester
Test regular expressions with live matches and flags.
Regex Explainer
Explain regular expression patterns in plain language.
Gitignore Generator
Generate .gitignore files for common stacks.
Chmod Calculator
Convert Unix file permissions between symbolic and octal forms.
MIME Type Lookup
Find MIME types by extension or content type.
IP Subnet Calculator
Calculate CIDR ranges, hosts, and masks.
DNS Lookup
Look up DNS records for domains.
OpenAPI Viewer
Preview OpenAPI and Swagger documents.
GraphQL Query Formatter
Format GraphQL queries and mutations.
README Generator
Generate project README sections and badges.
Git Command Builder
Use git command builder online in a fast, private, browser-based developer workflow.
Git Commit Message Generator
Use git commit message generator online in a fast, private, browser-based developer workflow.
Conventional Commit Builder
Use conventional commit builder online in a fast, private, browser-based developer workflow.
Semver Comparator
Use semver comparator online in a fast, private, browser-based developer workflow.
Semver Bump Calculator
Use semver bump calculator online in a fast, private, browser-based developer workflow.
NPM Package Name Checker
Use npm package name checker online in a fast, private, browser-based developer workflow.
Package Version Comparator
Use package version comparator online in a fast, private, browser-based developer workflow.
Package JSON Script Viewer
Use package json script viewer online in a fast, private, browser-based developer workflow.
Dependency List Formatter
Use dependency list formatter online in a fast, private, browser-based developer workflow.
NPM Install Command Builder
Use npm install command builder online in a fast, private, browser-based developer workflow.
Package Manager Command Converter
Use package manager command converter online in a fast, private, browser-based developer workflow.
Package Version Range Explainer
Use package version range explainer online in a fast, private, browser-based developer workflow.
Docker Run Command Builder
Use docker run command builder online in a fast, private, browser-based developer workflow.
Docker Compose Port Mapper
Use docker compose port mapper online in a fast, private, browser-based developer workflow.
Kubernetes YAML Validator
Use kubernetes yaml validator online in a fast, private, browser-based developer workflow.
Kubernetes Resource Calculator
Use kubernetes resource calculator online in a fast, private, browser-based developer workflow.
Helm Values Viewer
Use helm values viewer online in a fast, private, browser-based developer workflow.
Env Var Diff Tool
Use env var diff tool online in a fast, private, browser-based developer workflow.
Dotenv Validator
Use dotenv validator online in a fast, private, browser-based developer workflow.
Makefile Target Viewer
Use makefile target viewer online in a fast, private, browser-based developer workflow.
CI YAML Validator
Use ci yaml validator online in a fast, private, browser-based developer workflow.
GitHub Actions Workflow Validator
Use github actions workflow validator online in a fast, private, browser-based developer workflow.
GitLab CI Validator
Use gitlab ci validator online in a fast, private, browser-based developer workflow.
Markdown Badge Generator
Use markdown badge generator online in a fast, private, browser-based developer workflow.
License Picker
Use license picker online in a fast, private, browser-based developer workflow.
SPDX License Lookup
Use spdx license lookup online in a fast, private, browser-based developer workflow.
Changelog Generator
Use changelog generator online in a fast, private, browser-based developer workflow.
API Changelog Formatter
Use api changelog formatter online in a fast, private, browser-based developer workflow.
Release Notes Generator
Use release notes generator online in a fast, private, browser-based developer workflow.
Feature Flag Matrix Builder
Use feature flag matrix builder online in a fast, private, browser-based developer workflow.
A B Test Sample Size Calculator
Use a b test sample size calculator online in a fast, private, browser-based developer workflow.
Latency Percentile Calculator
Use latency percentile calculator online in a fast, private, browser-based developer workflow.
Rate Limit Calculator
Use rate limit calculator online in a fast, private, browser-based developer workflow.
Backoff Calculator
Use backoff calculator online in a fast, private, browser-based developer workflow.
Retry Schedule Generator
Use retry schedule generator online in a fast, private, browser-based developer workflow.
Port Availability Checker
Use port availability checker online in a fast, private, browser-based developer workflow.
CIDR Range Splitter
Use cidr range splitter online in a fast, private, browser-based developer workflow.
CIDR Merge Helper
Use cidr merge helper online in a fast, private, browser-based developer workflow.
IPv4 Converter
Use ipv4 converter online in a fast, private, browser-based developer workflow.
IPv6 Converter
Use ipv6 converter online in a fast, private, browser-based developer workflow.
MAC Address Formatter
Use mac address formatter online in a fast, private, browser-based developer workflow.
DNS Record Formatter
Use dns record formatter online in a fast, private, browser-based developer workflow.
DNS Zone File Formatter
Use dns zone file formatter online in a fast, private, browser-based developer workflow.
Hostname Validator
Use hostname validator online in a fast, private, browser-based developer workflow.
URL Redirect Chain Parser
Use url redirect chain parser online in a fast, private, browser-based developer workflow.
UUID Validator
Use uuid validator online in a fast, private, browser-based developer workflow.
ULID Validator
Use ulid validator online in a fast, private, browser-based developer workflow.
Nano ID Generator
Use nano id generator online in a fast, private, browser-based developer workflow.
Mock API Response Generator
Use mock api response generator online in a fast, private, browser-based developer workflow.
Test Data Generator
Use test data generator online in a fast, private, browser-based developer workflow.