Format CSS Online
Format CSS online with consistent indentation so stylesheets, embedded rules, and minified CSS are easier to read, inspect, and debug. Paste compressed or hand-edited CSS and the formatter expands each selector and property onto its own line with clean spacing.
How to use CSS Formatter
Paste or type content into the css input panel.
Run the formatter to clean up spacing, indentation, and structure.
Copy or download the formatted result when it looks right.
Why this helps in real workflows
Minified CSS from a production build or third-party stylesheet needs to be expanded so you can read and debug a specific rule.
A CSS snippet copied from a design tool, browser DevTools, or documentation has inconsistent formatting and needs cleaning up.
You are reviewing someone else's stylesheet and want consistent indentation before making changes or leaving feedback.
Inline styles or dynamically generated CSS are all in one line and need formatting before inspection.
Common problems and fixes
Some rules are missing from the formatted output.
Check the source CSS for syntax errors — unclosed braces, missing semicolons, or invalid property values can cause the parser to skip rules. Fix any errors in the source before formatting.
Vendor-prefixed properties like -webkit- are being removed.
The formatter should preserve all property declarations including vendor prefixes. If they are missing, check the source CSS — they may not have been present in the input you pasted.
The formatted CSS is larger than the original.
Formatting adds whitespace and line breaks for readability, which increases the file size. This is expected — use the formatted version for development and editing. For production, minify the CSS again before deploying.
Related tools
Related Guides
Frequently asked questions
How do I format CSS?
Paste your CSS into the input box, run the formatter, and copy or download the formatted CSS output.
Can this CSS formatter clean compressed CSS?
Yes. It reformats dense or single-line CSS into a more readable structure with each property on its own line.
Is this CSS formatter free?
Yes. It is free to use in your browser.
Does formatting CSS change how it behaves?
No. Adding whitespace and line breaks between selectors and properties has no effect on how a browser applies the styles. The formatted CSS is functionally identical to the original.
Can I format CSS that includes media queries and keyframes?
Yes. The formatter handles standard CSS constructs including media queries, keyframe animations, custom properties, and nested at-rules.
What is the difference between formatting and minifying CSS?
Formatting expands CSS for readability — each rule on its own line with indentation. Minifying compresses CSS by removing all whitespace for a smaller file size. Use formatting for development; use minifying for production.