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

Popular
64

Base64 Encode / Decode

Encode and decode base64 strings in seconds
ID

UUID Generator

Generate unique identifiers for your projects

Popular
#

Hash Generator

Create MD5, SHA-1, SHA-256, and more hashes
URL

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

JWT Decoder

Decode and inspect JSON Web Tokens
Δ

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.