PDF Accessibility Checks Explained
Summary
PDF Checker evaluates automated accessibility requirements aligned with WCAG 2.2 AA and PDF/UA standards. The checks are grouped into four categories.
Structure checks
Structure checks evaluate whether:
- A document contains a tag tree
- The tag structure supports the intended reading order
Proper structure helps assistive technologies understand document organization.
Image checks
Image checks evaluate whether:
- Images include alternative text
- Charts include alternative text
- Logos include alternative text
- Decorative images are appropriately identified
These checks help ensure non-text content can be understood by assistive technologies.
Content checks
Content checks evaluate whether:
- Tables use header information
- Lists use proper list markup
- Links contain meaningful text
These checks help improve navigation and comprehension.
Metadata checks
Metadata checks evaluate whether:
- A meaningful document title exists
- A document language is defined
This information helps assistive technologies correctly interpret document content.
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