Free Tools
Developer Utilities Tools
The utilities engineers reach for daily: format and validate data, encode and decode, diff, hash and inspect — all running locally in your browser.
JSON Formatter & Validator
Formats, validates and beautifies JSON with clear error locations.
JSON Minifier
Strips whitespace from JSON to reduce payload size.
JSON to CSV Converter
Converts a JSON array of objects into a downloadable CSV file.
CSV to JSON Converter
Converts CSV data into a JSON array of objects.
CSV Cleaner
Trims whitespace, removes empty rows and de-duplicates a CSV file.
XML Formatter
Formats and validates XML with proper indentation.
XML to JSON Converter
Converts XML documents into equivalent JSON structure.
YAML to JSON Converter
Converts YAML into JSON and validates it along the way.
JSON to YAML Converter
Converts JSON into readable YAML.
HTML to Markdown Converter
Converts HTML content into clean Markdown.
Markdown to HTML Converter
Renders Markdown into HTML with a live preview.
HTML Formatter
Beautifies minified or poorly indented HTML.
HTML Minifier
Compacts HTML by removing whitespace and comments.
CSS Formatter
Beautifies minified or inconsistent CSS.
CSS Minifier
Compacts CSS by removing whitespace and comments.
JavaScript Formatter
Beautifies minified or inconsistently formatted JavaScript.
JavaScript Minifier
Strips comments and unnecessary whitespace from JavaScript.
SQL Formatter
Formats SQL queries with consistent indentation and keyword casing.
Regex Tester
Tests a regular expression against sample text with live match highlighting.
Regex Pattern Library
A curated library of common regex patterns (email, URL, IP, phone and more) with live testing.
Diff Checker
Compares two blocks of text line by line and highlights the differences.
Text Diff (Word Level)
Compares two blocks of text at the word level for precise editing changes.
JWT Decoder
Decodes a JSON Web Token's header and payload without verifying the signature.
Base64 Encoder
Encodes text into Base64, handling full Unicode correctly.
Base64 Decoder
Decodes Base64 back into readable text, handling full Unicode correctly.
URL Encoder
Percent-encodes text for safe use in a URL.
URL Decoder
Decodes percent-encoded URL components back to readable text.
UUID Generator
Generates RFC 4122 version 4 UUIDs, one or many at a time.
Password Generator
Generates strong random passwords with configurable character sets.
Hash Generator (MD5, SHA-1, SHA-256, SHA-512)
Computes MD5 and SHA-family hashes of any text.
Unix Timestamp Converter
Converts between Unix timestamps and human-readable dates, with a live clock.
Cron Expression Explainer
Converts a cron expression into a plain-English schedule description.
Cron Expression Generator
Builds a cron expression from plain-language schedule choices.
User-Agent Parser
Parses a User-Agent string into browser, OS and device details.
HTTP Status Code Lookup
A searchable reference of every standard HTTP status code and its meaning.
MIME Type Lookup
A searchable reference of common file extensions and their MIME types.
CIDR / IP Subnet Calculator
Calculates network address, broadcast address and host range from a CIDR block.
Lorem Ipsum Generator
Generates placeholder text by paragraph, sentence or word count.
Character & Byte Counter
Counts characters, bytes, words and lines in real time.