HTML Validator
Validate HTML code for syntax errors, accessibility issues, and W3C compliance. Ensure your HTML is standards-compliant.
HTML Input
Validation Results
Validation results will appear here...
📝 HTML Best Practices
Structure & Syntax
- Use proper DOCTYPE declaration
- Close all tags properly
- Nest elements correctly
- Use semantic HTML5 elements
- Validate attributes and values
Accessibility
- Use alt text for images
- Provide proper heading hierarchy
- Use semantic markup
- Add ARIA labels where needed
- Ensure keyboard navigation
SEO Optimization
- Use descriptive title tags
- Add meta descriptions
- Use proper heading structure
- Include semantic markup
- Optimize image attributes