Free Online Developer Tools
Fast, privacy-first utilities for encoding, formatting, hashing, and more. All tools run in your browser — no data leaves your machine.
JSON Formatter & Validator
Beautify and validate JSON data instantly
PopularBase64 Encode / Decode
Encode and decode base64 strings in seconds
UUID Generator
Generate unique identifiers for your projects
PopularHash Generator
Create MD5, SHA-1, SHA-256, and more hashes
URL Encode / Decode
Safely encode and decode URLs and query strings
Word & Character Counter
Count words, characters, and lines in any text
Regex Tester
Test and debug regular expressions with live feedback
JWT Decoder
Decode and inspect JSON Web Tokens
Text Diff Checker
Compare and highlight differences between texts
Color Converter
Convert between HEX, RGB, HSL, and color names
Free Online Developer Tools
DevTools Hub provides a curated collection of free, privacy-first developer utilities designed for modern web developers. Whether you need to format JSON, encode/decode data, generate hashes, or test regular expressions, our tools are built to be fast, reliable, and completely transparent about data handling. Every tool runs entirely in your browser — no server-side processing, no data collection, no tracking.
We believe developers deserve tools they can trust. That's why DevTools Hub is built with privacy at its core. All computations happen locally on your machine, and your data never leaves your browser. Focus on what matters: building great software. Our utilities are designed to be simple, intuitive, and powerful, helping you solve common development tasks without unnecessary complexity or hidden data practices.