Fast, Free, and Developer-Friendly
Online Tools
Use 5+ browser-based developer tools — from JSON Formatter Online and JWT Decoder to Base64 Converter and Regex Tester. No sign-ups, no tracking, just instant, accurate results.
// Developer Tools Demo
const token = "eyJhbGciOiJIUzI1NiJ9...";
// JSON formatting
formatJSON(jsonData);
// Base64 encoding
base64Encode("Hello");
// JWT decoding
decodeJWT(token);
return "✨ Done!";Essential Developer Tools
Simple, fast, and reliable utilities for modern development
JSON Formatter
Format, validate and beautify JSON data with syntax highlighting
Base64 Converter
Encode and decode Base64 strings securely in your browser
JWT Decoder
Decode and verify JSON Web Tokens instantly
Regex Tester
Test and debug regular expressions with real-time matching
Timestamp Converter
Convert between Unix timestamps and human-readable dates
Why Developer Tool Kit?
Your all-in-one toolkit for web developers and testers. Format JSON, decode JWTs, test regex, and convert timestamps — fast, private, and free.
Private by Design
Runs fully in your browser. No data stored or shared.
Lightning Fast
Instant client-side execution for quick results.
Browser-Native
Works on all devices, no installs or logins.
Free Forever
Every tool is completely free to use.
Ready to Try Developer Tool Kit?
Explore 5+ free online developer tools — including JSON Formatter, JWT Decoder, Base64 Converter, and Regex Tester. 100% browser-based, secure, and built for speed.