Developer Tools

Essential utilities built for developers — format, validate, encode, decode, and generate data directly in your browser. No installation, no server uploads, no sign-up required.

100% free & private — runs in your browser
No sign-up required
JSON Formatter & Validator
Format, beautify, minify, and validate JSON data
JSON to CSV Converter
Convert JSON arrays to Comma-Separated Values (CSV) formats
XML to JSON Converter
Format, parse, and convert between XML and JSON documents safely
SQL Formatter & Beautifier
Format unreadable inline SQL queries with proper indentation
CSS Minifier & Beautifier
Minify CSS for production or beautify it for readability
JWT Decoder
Decode JSON Web Tokens, inspect header/payload, and check expiration
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings
HTML Entity Encoder / Decoder
Convert special characters like < to < or decode them back
URL Encoder / Decoder
Encode or decode special characters in URLs
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes
Regex Tester & Matcher
Test your expressions against strings in real-time with highlighting
Cron Job Generator
Generate or parse cron expressions into human-readable text
Markdown Preview
Write GitHub-Flavored Markdown and preview rendered HTML instantly

About Developer Tools

Whether you're debugging API responses, formatting database queries, or securing your application, these free developer tools handle the repetitive work so you can stay focused on building. Every tool runs entirely client-side for maximum privacy.

The JSON Formatter instantly beautifies and validates nested JSON of any depth. The SQL Formatter turns dense one-liner queries into readable, indented SQL. The CSS Minifier strips whitespace and comments for production-ready stylesheets — or pretty-prints minified CSS for readability.

Security-focused tools include a JWT Decoder (inspect claims and check expiry without any server call), a Hash Generator supporting MD5, SHA-1, SHA-256, and SHA-512, and a Base64 Encoder / Decoder for quick data encoding tasks. The Regex Tester highlights matches in real time as you type, making expression building intuitive and fast.

Utility tools round out the category: Cron Job Generator converts expressions to plain English and vice versa, Markdown Preview renders GitHub-Flavored Markdown instantly, and converters for JSON↔CSV and XML↔JSON make data transformation a one-click operation.