Three languages
One tool beautifies and minifies HTML, CSS and JavaScript with rules tuned to each language's syntax.
HTML · CSS · JavaScript · Beautify · Minify · No upload
Code Formatter & Beautifier
Paste messy HTML, CSS or JavaScript to instantly re-indent it into clean, readable code, or collapse it to a minified single block. The language is detected automatically, but you can force HTML, CSS or JS for ambiguous snippets. Choose 2, 3, 4-space or tab indentation, then copy or download the result. Everything runs in your browser — nothing is uploaded.
Input code
Formatted output
Waiting for input
Ready
Key features
Auto-detect
Paste anything and the detector picks the right language, or lock it manually when a snippet is ambiguous.
Beautify & minify
Re-indent unreadable one-liners or compress code to the smallest safe size for production in one click.
100% local
Parsing runs in your browser with no upload, so private templates, keys and snippets never leave your machine.
Frequently asked questions
How do I beautify messy code?
Paste your HTML, CSS or JavaScript and keep the Beautify tab selected. The tool re-indents every block, puts statements and rules on their own lines, and shows clean output on the right. Use Copy or Download to take it with you.
How does language detection work?
In Auto mode the tool looks at the structure of your code — angle-bracket tags suggest HTML, selector blocks with { } and ; suggest CSS, and everything else is treated as JavaScript. If a fragment is ambiguous, click HTML, CSS or JavaScript to force it.
Can it minify as well as beautify?
Yes. Switch to the Minify tab to strip comments and collapse whitespace. CSS and HTML compress aggressively; JavaScript is minified conservatively — line breaks that matter for automatic semicolon insertion are preserved so the output keeps running.
Does it format the CSS and JavaScript inside an HTML file?
Yes. When you beautify HTML, the contents of <style> blocks are run through the CSS formatter and <script> blocks through the JavaScript formatter, while <pre> and <textarea> are left untouched to preserve their literal whitespace.
Is my code sent to a server?
No. All formatting happens locally in your browser using JavaScript. Nothing leaves your machine and the page keeps working offline once loaded.