CSS Beautifier — Free Online Tool
Format messy or minified CSS into clean, readable code. · No signup · Works on mobile
100% private: your data is processed in your browser. Nothing is uploaded to our servers.
How to use the css beautifier
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1
Paste your CSS — minified production code or a messy stylesheet.
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2
Pick indentation (2 spaces, 4 spaces, or tabs) and click Beautify.
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3
Copy the formatted result — or click Minify to go the other direction.
What does this tool do?
This free CSS beautifier turns minified or messy stylesheets into clean, readable code with consistent indentation, one declaration per line, and proper spacing around braces. It also works in reverse — minifying formatted CSS for production. Everything runs locally with no upload.
How does the css beautifier work?
The formatter tokenizes your CSS — selectors, declaration blocks, at-rules, and media queries — then re-emits it with your chosen indentation, correctly handling nested rules inside @media and @supports blocks and preserving multi-value properties like box-shadow lists.
Frequently Asked Questions
Why would I need to beautify CSS?
The usual scenario: you need to modify production CSS that was minified into a single unreadable line. Beautifying restores structure so you can find and edit rules. It's also useful for learning from other sites' styles and standardizing formatting across a team.
Does beautifying change how my CSS behaves?
No. Whitespace and line breaks have no effect on CSS parsing (outside of quoted strings, which are preserved). Beautified and minified versions of the same stylesheet render pixel-identically — only file size and human readability differ.
Is the CSS beautifier really free?
Yes — 100% free with no hidden charges, trial limits, or premium tiers for core features. No account or email needed. The site is supported by non-intrusive display ads, which keeps every tool free for everyone.
Are my files private when using the CSS beautifier?
Completely. The CSS beautifier processes everything locally in your browser — your files are never uploaded to any server. When you close the tab, everything is gone. This makes it safe for confidential documents, client work, and personal photos.
Does the CSS beautifier work on mobile phones?
Yes. It's built mobile-first and works on any modern phone browser — iPhone (Safari) and Android (Chrome) included. You can pick files straight from your camera roll and download results directly to your device.
Do I need to install any software to use the CSS beautifier?
No. The CSS beautifier runs entirely in your web browser — no downloads, extensions, or signup. Open the page, use the tool, download your result. It works on Windows, macOS, Linux, ChromeOS, iOS, and Android.