Free Online Developer Tools
A collection of free, fast, and privacy-focused developer tools. Encode Base64, generate UUIDs, decode JWTs, format JSON, convert timestamps, and convert colors — all directly in your browser with no sign-up required.
Our Developer Tools
UUID Generator
Generate universally unique identifiers (UUIDs v4) instantly.
Base64 Encoder/Decoder
Encode or decode Base64 strings instantly in your browser.
JSON Formatter
Format, prettify, and validate JSON data instantly.
JWT Reader
Decode and inspect JSON Web Tokens (JWT) header, payload, and signature.
UNIX Timestamp Converter
Convert UNIX epoch timestamps to human-readable dates and vice versa.
Color Converter
Convert colors between HEX and RGB formats with live preview.
Why Use Our Developer Tools?
All tools run entirely in your browser — your data never leaves your device. No accounts, no tracking, no server-side processing. Just fast, reliable utilities built for developers, designers, and system administrators.
100% Client-Side Processing
Every tool on this site processes data locally in your web browser using JavaScript. Whether you're decoding a JWT token, formatting JSON, or generating a UUID, nothing is sent to any server. Your data stays private and secure.
No Sign-Up Required
Start using any tool immediately — no registration, no email, no login. Bookmark this page and come back anytime you need a quick developer utility.