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HTML / CSS / JS beautifier & minifier — offline

Readable or tiny — formatted on your device, with the real Terser compiler for JS.

100% private — files never leave your device
Input
Output

How it works

  1. 1

    Pick the language.

  2. 2

    Paste your code.

  3. 3

    Beautify for readability or minify for size, then copy.

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Frequently asked questions

Is my source code uploaded?

No — beautifying uses js-beautify and JS minification uses Terser, both running in your browser. Proprietary code stays on your machine.

What can it format?

HTML, CSS, and JavaScript — beautify (readable indentation) or minify (smallest size). JS minification uses the real Terser compiler; HTML/CSS minification strips comments and collapses whitespace.

Does minified JS behave identically?

Terser performs safe transformations only — the output is functionally equivalent, just smaller.