Web Validator by DigestSEO
Validate HTML and CSS, audit technical SEO and JSON-LD, and check user-authorized public links.
Community: Submitted by a user or imported; check the owner before granting accessOnlineNo sign-inGlobalFreeRead-only
What it can do
- Validate Html: Sends supplied HTML markup to the W3C Nu HTML Checker and returns validation messages. Use only markup you are authorized to share.
- Validate Css: Parses supplied CSS locally and returns syntax messages without contacting an external service.
- Audit Seo Metadata: Analyzes supplied HTML locally for title, description, canonical, viewport, heading, image-alt, and Open Graph issues.
What data it sees
Do you need an account
No: the server works without sign-in
Validate HTML and CSS, audit technical SEO and JSON-LD, and check user-authorized public links. By digestseo.com.
Server tool list (6)
Raw names from tools/list. Only developers need these.
| validate_html | Sends supplied HTML markup to the W3C Nu HTML Checker and returns validation messages. Use only markup you are authorized to share. |
| validate_css | Parses supplied CSS locally and returns syntax messages without contacting an external service. |
| audit_seo_metadata | Analyzes supplied HTML locally for title, description, canonical, viewport, heading, image-alt, and Open Graph issues. |
| validate_schema_markup | Parses JSON-LD blocks in supplied HTML and reports JSON syntax problems without contacting external services. |
| check_broken_links | Checks up to 25 public HTTP(S) links found in supplied HTML. It does not follow redirects or fetch response bodies. Use only URLs you are authorized to inspect. |
| generate_validation_report | Combines W3C Nu HTML validation with local CSS, SEO, and JSON-LD checks for supplied markup. Optionally checks public links when the user has authorized those requests. |