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Developer Tools

Essential developer utilities that run 100% in your browser. Format JSON, test regex, decode JWTs, minify code and more — all private, all instant.

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All 10 Developer Tools

PopularLive
#01

JSON Formatter

Validate, format, and minify JSON with syntax highlighting

Live
#02

Base64 Encoder/Decoder

Encode/decode text and files to/from Base64

Live
#03

URL Encoder/Decoder

Encode special characters in URLs and decode them back

Live
#04

HTML Formatter

Beautify and minify HTML code

Live
#05

CSS Minifier

Remove whitespace and comments from CSS

Live
#06

JS Minifier

Minify JavaScript for production use

PopularLive
#07

Regex Tester

Live regex testing with match highlighting

Live
#08

Color Code Converter

Convert between HEX, RGB, HSL, and CMYK

Live
#09

JWT Decoder

Decode and inspect JSON Web Tokens without a secret

Live
#10

Markdown Previewer

Live side-by-side Markdown editor and HTML preview