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Developer Tools

Regex tester, color picker, code formatters, JWT decoder, and more.

10 tools available · Free · No signup required

Regex Tester

Test regular expressions with live match highlighting.

Color Picker

Pick colors and get HEX, RGB, HSL, and HSV values instantly.

CSS Gradient Generator

Build beautiful CSS gradients visually and copy the code.

Box Shadow Generator

Generate CSS box-shadow with a live visual preview.

HTML Minifier / Beautifier

Minify or format HTML code with a single click.

CSS Minifier / Beautifier

Minify or format CSS code instantly.

JS Minifier / Beautifier

Minify JavaScript with Terser or format it with Prettier.

Markdown to HTML

Convert Markdown to HTML with a live side-by-side preview.

JWT Decoder

Decode and inspect JWT tokens — header, payload, and signature.

Diff Checker

Compare two text blocks and highlight the differences.

About Our Free Developer Tools

Our developer toolbox includes a regex tester, color picker, CSS gradient and box-shadow generators, HTML/CSS/JS minifiers and beautifiers, Markdown-to-HTML converter, JWT decoder, and a diff checker — all running 100% in the browser.

Built for front-end and full-stack developers who need quick utilities without leaving the browser. No backend, no latency, no data sent to servers. This matters for the JWT decoder in particular: tokens you paste are decoded locally and never transmitted anywhere.

All developer tools are completely free and require no login. Bookmark this page and save time on your everyday development workflow.