ValidateHTML

What it does

12 free web validation tools in one place. Paste code or enter a URL, get instant results with a quality score (0-100). → HTML/CSS/JSON/XML Validators → Meta Tag & Open Graph Checkers → HTML Formatter (beautify + minify) → Robots.txt Analyzer & Page Size Checker Built for devs, SEO pros, and designers tired of W3C Validator's 2005 UX. No signup, no limits, 100% free.

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