What can I beautify or minify?

HTML, CSS, and JavaScript — in both directions. Beautifying reformats code with clean indentation; minifying strips it down to reduce file size. Each language-and-mode combination also has its own dedicated page.

What engines power it?

Beautifying uses Prettier's standalone build — the same formatter many teams run in their editors. JavaScript is minified with Terser and CSS with CSSO; HTML is minified conservatively so rendering is never changed.

Is my code uploaded anywhere?

No. Everything runs in your browser with JavaScript, so your code never leaves your device. It's free with no sign-up; a single unobtrusive ad slot covers hosting.

Omnibus

Beautify JavaScript

Paste JavaScript on the left, or try an example.

100% Free
No Sign-Up
No Credit Card
No Free Trial
No Pro Tier
No Watermarks

Nothing is uploaded. Just open it and start.

Beautify and minify HTML, CSS, and JavaScript

Paste your code and format it cleanly or minify it to ship — for HTML, CSS, and JavaScript — all in your browser. Powered by Prettier, Terser, and CSSO. No sign-up, nothing uploaded.

Beautify with Prettier

Clean, consistent formatting for HTML, CSS, and JavaScript — the editor-grade engine.

Minify to ship

Shrink CSS with CSSO and JS with Terser; collapse HTML safely to cut file size.

A page per task

Every language-and-mode pair has its own page — or switch instantly in the tool.

Private & client-side

Your code never leaves the browser. No server round trip, ever.

All formatters & minifiers

HTML Beautifier HTML Minifier CSS Beautifier CSS Minifier JavaScript Beautifier JavaScript Minifier

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Frequently asked questions

What can I beautify or minify?: HTML, CSS, and JavaScript — in both directions. Beautifying reformats code with clean indentation; minifying strips it down to reduce file size. Each language-and-mode combination also has its own dedicated page.
What engines power it?: Beautifying uses Prettier's standalone build — the same formatter many teams run in their editors. JavaScript is minified with Terser and CSS with CSSO; HTML is minified conservatively so rendering is never changed.
Is my code uploaded anywhere?: No. Everything runs in your browser with JavaScript, so your code never leaves your device. It's free with no sign-up; a single unobtrusive ad slot covers hosting.