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Validate HTML

Automatic HTML structure audit

How it works

Advantages

Accurate code diagnostics
Detect syntax and structural errors in HTML.
Improved SEO and accessibility
Correct HTML contributes to better ranking and accessibility.
Fast analysis
Instant verification without the need to install additional tools.
Recommendations for fixes
Detailed guidelines for fixing errors found.

Tools

Validate HTML
Accessibility
CSS
Design tokens
RSC Payload

FAQ

Correct HTML ensures that pages display correctly, improves SEO and accessibility for users with special needs.

It is recommended that you validate every time you make a major change to your page structure or before launching new features.

Browsers often ignore minor bugs, but they can break SEO, accessibility, or cause problems with updates. Validation helps prevent hidden bugs.

Use the tooltips in the report: click on the error to see a description and examples of fixes. For example, add missing attributes or fix tag nesting.

The validator checks for standards compliance, but not functionality. Check JavaScript code, styles and server-side scripts separately. Use developer tools in the browser to troubleshoot.
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HTML Validity Checker Online - Fix Code Errors | Milten