CSS Validator

Validate CSS for syntax errors and style issues. Find missing semicolons and mismatched braces.

CSS Input

Validation Results

Results will appear here

Validate Your CSS

Check CSS for syntax errors and potential issues before deploying.

CSS Validation

How this CSS Validator works

This validator checks CSS for syntax errors and potential issues through pattern-based analysis. It detects common problems including mismatched braces, missing semicolons, empty rules, and excessive !important usage that can cause styling problems.

Error messages identify specific line numbers and describe the type of issue found, making it easy to locate and fix problems. Warnings highlight potential issues that may not break the CSS but could indicate maintainability problems or accidental omissions.

All validation runs client-side in your browser, making it safe for checking proprietary stylesheets. The tool is particularly useful for catching errors before deployment and reviewing CSS from external sources.

How to Use

Paste CSS

Enter your CSS code.

Validate

Click to check for errors and warnings.

Fix Issues

Address any problems found.

Example Usage

Validating CSS:

Input

.box { color: red }

Output

Warning: Missing semicolon

Frequently Asked Questions

What does CSS Validator check?

It checks for syntax errors like mismatched braces, missing semicolons, and style issues like !important overuse.

Is my code safe?

Yes, all validation happens in your browser.

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The CSS Validator is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.