ValidateHTML
Free HTML validator and SEO auditor — all in one tool.
About ValidateHTML
Free HTML validator and SEO auditor. Check your HTML for errors, validate meta tags, audit Open Graph tags, test accessibility, and verify robots.txt — all in one tool.
Key Features
- HTML validation
- Meta tag checker
- Open Graph validator
- Accessibility checker
- Robots.txt checker
- Page size analyzer
- HTTP status checker
Pros
- Completely free
- Multiple tools in one
- Clean interface
- No signup required
Cons
- New platform
- No API yet
Integrations
Browser-based (no integrations needed)
Best Use Cases
- HTML validation before deployment
- SEO meta tag auditing
- Accessibility compliance checking
- Open Graph debugging
ValidateHTML Alternatives
Looking for alternatives to ValidateHTML? See all ValidateHTML alternatives →
Quick Info
- Website
- validatehtml.com
- Founded
- 2026
- Company
- 1-10
- Pricing
- free
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