Free Online CSS Formatter — Beautify & Minify CSS
Beautify minified CSS into readable rules or minify CSS for production. Media queries and comments stay intact.
Quick answer
To format CSS, paste it into the KaviForge CSS Formatter and it is beautified instantly — one declaration per line with consistent indentation. Click "Minify" to remove comments and whitespace and shrink the stylesheet for production.
Format or minify CSS in your browser. Expand minified stylesheets for debugging, or compact CSS to shrink payloads without uploading files.
Minifying your own CSS removes comments and whitespace, reducing download size and helping Core Web Vitals scores.
Related reading: 5 Reasons to Use an Online Formatter (Instead of Your IDE), and Why is Our JSON Formatter So Fast? A Look at Next.js Performance.
How to Format or Minify CSS
- 1Paste your CSS into the input box, or upload a .css file.
- 2Choose 2 spaces, 4 spaces, or tabs for indentation.
- 3Read the beautified CSS in the output box.
- 4Click "Minify" to compress the stylesheet instead.
- 5Copy the result or download it as formatted.css.
Features
Beautify CSS
One rule and declaration per line with clean indentation.
Minify CSS
Removes comments, whitespace, and trailing semicolons.
Media Queries & At-Rules
Correctly indents @media, @supports, @keyframes, and @font-face.
Indentation Choice
Match your project’s style with spaces or tabs.
File Upload & Download
Open .css files and save the result.
Private
Your stylesheet stays in your browser.
When to Use the CSS Formatter
Inspect third-party CSS
Unminify library or theme CSS to find the rule you need to override.
Reduce stylesheet size
Minify CSS for faster loading when you do not have a build step.
Clean up legacy stylesheets
Normalize inconsistent indentation before refactoring.
Share readable snippets
Format CSS for documentation, Stack Overflow answers, and code reviews.
About the CSS Formatter
Beautifying uses js-beautify’s CSS formatter. The minifier removes /* comments */, collapses whitespace, and trims spaces around braces, semicolons, commas, and child combinators.
The minifier keeps spaces around + and - so calc() expressions remain valid. For advanced optimization such as merging rules, use a build tool like Lightning CSS or cssnano.
CSS Formatter FAQs
How do I beautify minified CSS?
Paste the minified CSS into the KaviForge CSS Formatter. It is expanded with line breaks and indentation instantly.
How do I minify CSS online?
Paste your CSS and click "Minify". Copy or download the compressed output.
Does it support SCSS or LESS?
Basic SCSS and LESS syntax usually formats well, but the tool is designed for standard CSS.
Will minifying break my CSS?
The minifier only removes comments and unnecessary whitespace, so valid CSS keeps working. Test in your browser after minifying.
How much smaller will my CSS be?
Typically 15–30% smaller depending on how many comments and how much whitespace the file contains.
Is my CSS uploaded?
No. Formatting and minifying run locally in your browser.
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Related Guides & Tutorials
5 Reasons to Use an Online Formatter (Instead of Your IDE)
Why an online JSON formatter beats your IDE for a quick JSON payload. Pretty print or minify JSON instantly — no setup, no signup.
Why is Our JSON Formatter So Fast? A Look at Next.js Performance
Why JSON formatter fast: client-side Next.js, no upload, instant minify JSON. See the architecture — then try the free formatter now.