Check a PDF

One PDF, checked against the PDF/UA-1 machine rules with veraPDF, with findings by page and the original returned unchanged.

Before you start

5 checks / day

Shared across free tools for your public IP. Resets at 00:00 UTC. Need more? See plans and prices.

Full free-tier ruleThe shared-address caveat and the UTC reset

Without an account you can run five checks per day (PDF checks, web pages and HTML conversions combined, one at a time). The day resets at 00:00 UTC. The allowance is counted per public network address, so people sharing an office, campus or carrier network also share the five checks; it is not a personal quota and it cannot tell people on the same address apart.

Files expire after 24 hours

Save reports and output files before they expire.

Human review is still required

A machine-check result is not a compliance certificate.

What changes?

Only supported metadata is changed: missing language and an existing title display setting. With basic structure tags, a copy of an untagged PDF also gets paragraphs, figures and artifacts tagged from its page content; nothing else is inferred.

What is checkedPDF/UA-1 machine rules, structure probe, no visible content changes, no guessed structure

PDF/UA-1 validation with veraPDF, independently of any tool that produced the file
Structure probe: tags, marked content, reading-order snapshot, language and title metadata
Supported metadata fixes, on a separate copy only: /Lang from the language you give, DisplayDocTitle when a title exists
Basic structure tags, on a separate copy of an untagged PDF only: paragraphs, figures and artifacts in content-stream order; the result still needs human review
No heading, table, list, alternative-text, OCR or reading-order guesses — those are reported for a person
Signed or encrypted files are analysed where possible but never altered; damaged files are refused with a reason

The free check accepts one file up to 10 MB and 10 pages. Your upload goes straight to storage over a single-use link.

Check a PDF

01 / Source file

02 / Check mode

03 / Verification

Check a PDF

Check form

01 / Source file

02 / Check mode

03 / Verification