HTML Validator

About HTML Validation

HTML validation is essential for creating well-formed, standards-compliant websites. Our validator checks your HTML code for syntax errors, missing tags, invalid attributes, and compliance with HTML5 standards. Proper HTML validation ensures better browser compatibility, improved SEO, enhanced accessibility, and easier maintenance.

Why Validate HTML?

• Cross-Browser Compatibility: Valid HTML renders consistently across all browsers
• Better SEO: Search engines prefer properly structured HTML
• Accessibility: Valid markup is crucial for screen readers and assistive technologies
• Easier Debugging: Catch errors early in development
• Future-Proof: Standards-compliant code ages better

Common HTML Errors

• Unclosed tags (missing closing tags)
• Improperly nested elements
• Missing required attributes (e.g., alt on images)
• Invalid or deprecated elements
• Incorrect DOCTYPE declaration

Best Practices

• Validate HTML regularly during development
• Use semantic HTML5 elements
• Always include DOCTYPE declaration
• Close all tags properly
• Use proper attribute syntax

Frequently Asked Questions

Q: What is HTML validation?
A: HTML validation checks your HTML code for syntax errors, missing tags, and compliance with web standards like HTML5.

Q: Why should I validate HTML?
A: Validating HTML ensures cross-browser compatibility, improves SEO, helps with accessibility, and catches errors early.

Q: What errors does HTML validator catch?
A: The validator catches unclosed tags, missing attributes, invalid nesting, deprecated elements, and syntax errors.