Free Tools for Developers
JSON formatter, Base64, hash, QR, timestamp — a free dev toolkit.
Everything runs right in your browser.
JSON Formatter & Validator
Beautify, minify, validate, and sort JSON keys
Base64 Encode / Decode
Text ↔ Base64, and encode files to data URLs
URL Encode / Decode
URL encoding/decoding and a query-string parser
Color Converter
Convert between HEX, RGB, and HSL with preview
Timestamp Converter
Unix timestamp ↔ date (UTC / local)
Hash Generator
Compute SHA-1 / 256 / 384 / 512 instantly
JWT Decoder
Inspect a JWT's header, payload, and expiry
QR Code Generator
Turn text or URLs into a QR code and save as PNG
UUID Generator
Generate multiple UUID v4 values at once
Why is it safe?
The one thing that sets it apart from other converters
Dev work, finished in your browser
Dev Tools gathers the small tasks you hit constantly while coding and debugging into one free toolkit. Beautify an API response, decode a Base64 value, convert a color code to another notation, turn a Unix timestamp into a human-readable date, inspect a JWT — all right in the browser, with no heavy IDE extension and no separate web service to sign up for.
The biggest difference is how it works. Many online converters send your input to a server to process it; every tool here runs only inside your browser. The JSON, tokens, passwords, and API responses you paste never travel across the internet, so you can handle company data and credentials with confidence. There is no network round-trip either, so results are instant — and it even works while you are briefly offline.
Every tool shows results in a monospace font with a one-click copy button. The layout is responsive for mobile and supports dark mode. Bookmark the tools you use most and open them the moment you need them.
FAQ
Is it really free?
Yes. Every tool is free with no usage limits, and no sign-up, login, or email is required.
Is my input sent to a server?
No. JSON formatting, Base64 conversion, hashing, JWT decoding, QR generation and the rest all run in your browser via JavaScript. Your input never travels across the internet.
Do I need to install anything?
No. A modern browser like Chrome, Safari or Edge is all you need, on desktop or mobile. No extension required.
Is it safe to decode sensitive tokens or API keys?
Every tool — including the JWT decoder and hash generator — works offline, so tokens, keys, and passwords you paste never leave your device. Closing the tab clears the input.
Which tools are included?
Nine utilities developers reach for often: JSON formatter & validator, Base64 encode, URL encode, color converter, Unix timestamp converter, hash generator, JWT decoder, QR code generator, and UUID generator.