CSS beautifier for readable styles
CSS Formatter restores indentation and line breaks so selectors and declarations are easier to scan. It is useful when production CSS or third-party snippets are compressed into one line.
Developer Tools
CSS Formatter
Format CSS with consistent spacing and line breaks.
Use the tool
Use CSS Formatter to make compressed or messy stylesheets readable before debugging selectors, overrides, and declarations.
Dev Workbench
CSS Formatter
Format CSS with consistent spacing and line breaks.
Input
Result
Run the tool to see output.
Lines: 0Chars: 0
Why use CSS Formatter
- Beautify minified CSS copied from production bundles, themes, or page sources.
- Review selectors, media queries, custom properties, and declarations during UI debugging.
- Prepare CSS snippets for code reviews, bug reports, and design handoff notes.
- Compare messy stylesheet output before deciding what belongs in a cleaner source file.
About this tool
Debug selectors and overrides
Readable CSS makes cascade problems easier to reason about. After formatting, look at selector specificity, repeated rules, media queries, custom properties, and order-dependent overrides.
Format for review, minify for shipping
Formatted CSS is easier for people to read, while minified CSS is better for production payloads. Keep source CSS readable and let your build process compress assets for deployment.
Example usage
Input
body{margin:0}.btn{color:#fff;background:#2563eb}Output
body {\n margin: 0;\n}\n\n.btn {\n color: #fff;\n background: #2563eb;\n}Practical guide for CSS Formatter
Best practices
- Use formatting to inspect selectors, media queries, and cascade order.
- Keep formatted CSS for review and minified CSS for production delivery.
- Validate complex CSS separately when syntax correctness matters.
Common mistakes
- Expecting formatting to repair missing braces or invalid declarations.
- Formatting SCSS or LESS as plain CSS without checking nested syntax.
- Copying formatted CSS into production when the build expects minified assets.
How this tool works
Step 1
Open CSS Formatter and review the default example input.
Step 2
Paste your own input or upload source data when required.
Step 3
Run CSS Formatter to generate output instantly in the browser.
Step 4
Verify the output using the preview and formatting helpers on the page.
Step 5
Copy the final result and continue with a related tool if needed.
Related tools
Use related links to continue your workflow and keep your output consistent across ToolHarbor pages.
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Popular workflows
FAQ
Does CSS Formatter fix invalid CSS?
No. It improves readability, but syntax errors, missing braces, unsupported properties, and cascade bugs still need debugging.
Can I format SCSS or LESS?
Some plain CSS snippets will work, but nested SCSS, LESS variables, and mixins may not format correctly as standard CSS.
Why format CSS if production files are minified?
Formatting helps humans review and debug the stylesheet. Production delivery should still use minified assets when performance matters.
What should I check after formatting CSS?
Check selector order, specificity, media queries, duplicate rules, custom properties, and any syntax the formatter may not understand.