HTML Validator
Validate your HTML against W3C standards and best practices quickly and easily. Improve your web pages with our free online tool.
Enter your HTML or upload a file (Max size: 2MB)
1// Validation results will appear here...How to Use Our HTML Validator
Enter or Upload HTML
Paste your HTML code into the input area or upload an HTML file (up to 2MB).
Validate
Click Validate to check your HTML against W3C standards and best practices.
Review Results
View detailed validation messages and copy or download your HTML.
Features
W3C Compliance
Validate HTML against W3C standards (e.g., DOCTYPE, required tags, attributes).
File Upload
Upload HTML files up to 2MB for quick validation.
Detailed Feedback
Get detailed error and warning messages for non-compliant HTML.
Copy & Download
Easily copy or download your input HTML for further use.
Popular Use Cases
Web Development
Ensure your HTML code adheres to W3C standards for better compatibility.
SEO Optimization
Validate HTML to improve search engine ranking and accessibility.
Debugging
Identify and fix HTML issues before deployment.