validate HTML syntax – Validate HTML Syntax
🧹 Open HTML Formatter Tool
Use validate HTML syntax instantly – beautify, minify, or validate your HTML code.
Validation ensures your HTML follows W3C standards. It catches missing closing tags, invalid attributes, and nesting errors.
Common validation issues
- ❌ Unclosed tags (e.g., <div> without </div>)
- ❌ Duplicate IDs
- ❌ Invalid nesting (e.g., <li> outside <ul>)
- ❌ Deprecated attributes
Frequently Asked Questions
Do I need to validate HTML?
Yes – valid HTML ensures consistent rendering across browsers and better SEO.