Metadata Check reviews page title, H1/title relationship, canonical URL, social preview metadata, structured data, viewport metadata, and baseline document signals.
Good metadata helps people understand where they are, helps teams share the right page, and makes handoff less ambiguous. This section keeps identity problems separate from marketing polish.
What this feature is for
Metadata Check reviews page title, H1/title relationship, canonical URL, social preview metadata, structured data, viewport metadata, and baseline document signals.
Feature coverage
- Checks page title, H1/title relationship, canonical URL, visible URL/canonical mismatch, Open Graph metadata, Twitter card metadata, primary social preview image, structured data, viewport metadata, and baseline document signals.
- Groups core metadata mismatches, social preview image issues, missing metadata signals, and baseline document checks.
- Shows pass/warn/fail/grouped counts.
- Adds Metadata Check to the QA report.
WCAG and accessibility importance
Metadata Check is most directly connected to WCAG 2.4.2 Page Titled, because page titles help people identify where they are. The H1/title relationship can also support 1.3.1 Info and Relationships and 2.4.6 Headings and Labels when it reflects the visible page structure.
The accessibility importance is orientation and trust. Clear titles, stable page identity, and useful preview metadata help users, assistive technology, browser tabs, history, bookmarks, and shared links describe the right page.
Technical notes
- The runtime reads document title, visible primary H1 evidence, canonical link tags, Open Graph and Twitter card tags, structured data, and viewport configuration.
- Some mismatches are advisory because product pages, documentation pages, and marketing pages may intentionally use different H1 and title wording.
- The section is useful for release review because it makes page identity and preview behaviour visible before sharing links publicly.
Desktop tutorial video
Where to learn more
Official A11Y Cat documentation: https://carlashub.github.io/a11y-cat-extension/