Document Authenticity Checker
Score a PDF against a checklist of forensic signals - producer consistency, font fingerprinting, page uniformity, and more - and see exactly what was flagged.
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- Multi-file input
- Long-running / async
- Authenticity checker workspace
This tool runs a checklist of independent forensic signals over a PDF - whether the same tool produced every part of it, whether fonts are used consistently, whether pages match in size, whether numbers add up - and combines them into one weighted authenticity score. No single signal proves or disproves tampering on its own; each is reported with what it actually found so you can judge it yourself. It only reads the file; nothing is changed.
Simple workflow
How it works
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1
Add PDFs
Add one or more PDFs to the list, and pick a document type to tune which checks matter most.
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2
Check
Run the check on a file and open its signal breakdown.
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3
Review
Inspect each flagged signal and region, then export a report.
Frequently asked questions
Does a low score prove a document was tampered with?
No. Every signal here is a heuristic, not a forensic proof - a legitimately signed-then-annotated document, a scanned form, or an unusually laid-out but genuine invoice can all lower the score without anything being wrong. Read the flagged signals and judge them yourself; treat the score as a starting point for review, not a verdict.
Does this check certificate revocation or run OCR?
No. It works from the PDF's own structure, metadata and rendered content - no network calls, and no OCR of scanned images. A scanned or image-only document gets a lower-confidence score with an explicit note, since font and text-based signals have nothing to check.
What does "Template Match" need?
A known-genuine sample of the same document type (e.g. a verified bank statement from the same issuer), uploaded in the settings panel. The tool renders both documents and compares them visually - it is optional and off by default.
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