All Free.
Always.
No login. No ads. No rate limits.
Just open a tool and use it.
JSON Formatter
Format and validate JSON instantly. Free, no login.
JSON was invented by Douglas Crockford in 2001. It was inspired by JavaScript object literals but is now used in virtually every programming language!
Base64 Encoder / Decoder
Encode and decode Base64 strings online. Free, no login.
Base64 encoding increases file size by ~33%. It was originally designed for email attachments in the 1980s!
JWT Decoder
Decode and inspect JWT tokens. View header and payload.
A JWT token has 3 parts separated by dots. The middle part (payload) is just Base64 encoded — not encrypted! Never store passwords there.
Regex Tester
Test regular expressions live with real-time highlighting.
The concept of regex was invented by mathematician Stephen Kleene in 1951. Most developers still Google regex syntax every single time!
Color Converter
Convert colors between HEX, RGB and HSL with live preview.
Humans can distinguish about 10 million colors. CSS has 140 named colors — "rebeccapurple" was added in 2014 to honor a developer's daughter.
Image Compressor
Compress images in your browser. JPEG, PNG and WebP support.
The JPEG format was created in 1992. The "J" stands for Joint — as in Joint Photographic Experts Group, not the JS ecosystem!