CSS Formatter & Minifier
Input CSS
Paste CSS and click Beautify or Minify
Output CSS

CSS Formatter Beautifier Minifier Online Free — Free Online Tool

Format, beautify and minify CSS online free. Shows exact bytes saved and percentage reduction. Autoprefixer included. No upload — instant results in your browser.

Free Forever
No Signup
No Upload
100% Private
Browser-based

Features

Built for real developer workflows. No fluff, just the tools you need.

🎨

CSS Beautifier

Converts compressed CSS into properly indented, human-readable code. Each rule on its own line.

📦

CSS Minifier

Removes all whitespace and comments. Shows exact bytes saved and percentage reduction.

🔧

Vendor Autoprefixer

Adds -webkit-, -moz- and -ms- prefixes to transform, transition, animation and flexbox properties.

📊

Size Statistics

Original size, output size and percentage saved shown after every operation.

⚡

Instant Processing

All formatting runs in JavaScript — no upload, no server, no delay.

🔒

Private

Your CSS never leaves your browser.

How to use

Get results in seconds — no account, no file upload required.

1

Paste your CSS

Paste any CSS — compressed, minified or messy — into the input panel.

2

Beautify or Minify

Click Beautify for readable code. Click Minify for production-ready compressed CSS.

3

Copy the output

Click Copy to copy the formatted CSS.

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Frequently asked questions

Does beautifying CSS change how it renders?
▾
No. Beautifying only adds whitespace. Browsers ignore whitespace in CSS — rendering is identical.
How much does minification save?
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Typical CSS reduces by 20–40%. Files with many comments save more.
Should I use autoprefixing in production?
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For production, use PostCSS with Autoprefixer as a build step. This tool provides common prefixes for quick testing.
Can it handle SCSS or Less?
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Plain CSS only. Compile SCSS/Less to CSS first.
Why does beautified CSS have extra blank lines?
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The beautifier preserves blank lines as visual separators between rule sets.
Can I use minified CSS directly on my site?
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Yes. Minified CSS is functionally identical. Save as styles.min.css and reference it in your HTML.