CSS Validator
Check CSS code for syntax errors and compatibility issues
CSS Input
Enter your CSS code or provide a URL to validate
Validation Results
CSS validation results and recommendations
Enter CSS code and click "Validate CSS" to see results
CSS Best Practices
Syntax & Structure
- • Always end declarations with semicolons
- • Use consistent indentation (2 or 4 spaces)
- • Match opening and closing braces
- • Close all comments properly
Performance & Maintainability
- • Avoid using !important when possible
- • Use CSS custom properties for repeated values
- • Minimize duplicate properties
- • Use shorthand properties when appropriate