See the tags inside any PDF.
The tag tree is what a screen reader actually navigates, and until now the usual way to see it was the Tags panel in a paid copy of Acrobat Pro. Upload a PDF and inspect its full logical structure here instead: every tag, its role-mapped source, and an automated assessment of the machine-checkable properties.
Read-only and free, no account needed. Files are inspected in memory and never stored.
Up to 10 MB. Read-only: the file is inspected in memory, never changed or stored.
Read this before you rely on the result
Why a person is still part of accessibility.
What the machine verified
The tree shown here reflects the machine-checkable properties of each tag: its role, its mapping through the role map, and whether required wiring such as alternatives and structure parents is present. Those checks are real, and they are also the limit of what a machine can prove.
What only a person can decide
- Whether the reading order matches how a person actually reads the page, not just how text sits in the file.
- Whether a heading level inferred from type size reflects the document's real outline.
- What merged or multi-level table headers mean, and which cells they govern.
- Whether an image is informative or decorative, and what its description should say.
- Whether link text makes sense out of context, and where another language begins.
- Contrast, color-only meaning, and everything a screen reader user actually experiences.
Where this output stands
You see the structure assistive technology receives, with automated assessments clearly separated from the judgment calls listed here. This is the industry consensus, not our caveat: the Matterhorn Protocol that defines PDF/UA testing splits its checks into machine-verifiable and human-judgment conditions, the standard checkers pair automation with a required visual check, and the U.S. Department of Justice, extending the ADA Title II deadlines in 2026, observed that generative AI does not yet reliably automate remediation at scale. No tool that claims otherwise is being straight with you, and automated output here never carries a PDF/UA conformance claim.