CSS Validator

Validate, format, and minify CSS locally in your browser.

Input

Upload CSS file

Load from URL

Note: URL loading may fail if the server blocks CORS.

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Actions

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CSS

Tip: Use Format for readable CSS and Minify for compressed output.

Output

No validation yet Errors: 0 Warnings: 0

Issues

Info

Run Validate to see errors and warnings.

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This validator performs client-side checks (syntax heuristics + browser property support).

Formatted CSS

Minified CSS