Verify PDF Authenticity
HTPBE.tech is a free online tool that verifies whether a PDF is authentic — meaning it has not been modified after it was originally created. Upload any PDF and get a clear, evidence-backed verdict in seconds.
Used by finance teams, HR professionals, and compliance officers to verify document authenticity before acting on it.
What Makes a PDF Authentic
Every PDF carries hidden evidence of its history. Here is what to look for.
Timestamps are internally consistent
An authentic PDF has a creation date and modification date that agree with the document’s claimed origin. If the modification date trails the creation date by days or months on a document that should never have changed, that is a direct authenticity signal.
The creator and producer applications match what you expect
Every PDF carries a record of the software that created it and the software that last processed it. A bank statement produced by a PDF editing tool — rather than the bank’s own system — is a strong indicator of tampering.
No incremental revision layers in the file structure
Authentic documents are typically single-layer files. When a PDF has been edited, the changes are appended as additional revision layers that leave a structural fingerprint — invisible in any viewer but detectable through forensic analysis.
Digital signature is intact and valid
If a PDF was digitally signed, an authentic document will have a valid, unbroken signature. A modified document will have either an invalidated signature or no signature at all where one would be expected.
The Easy Way: Use HTPBE
All checks run automatically in seconds — no technical knowledge required.
Upload your PDF
Drop the document onto the checker at htpbe.tech — up to 10 MB. No account or registration required.
Forensic authenticity analysis runs automatically
HTPBE checks metadata timestamps, creator and producer fields, file structure revision layers, and digital signatures simultaneously — all in under 5 seconds.
Receive an authenticity verdict
A clear result — authentic, modified, or inconclusive — with a plain-language explanation of every finding that supports the verdict.
Frequently Asked Questions
What does it mean to verify PDF authenticity?
Verifying PDF authenticity means confirming that a PDF has not been altered since it was originally created. An authentic PDF has consistent internal metadata, no revision layers from editing tools, and valid digital signatures if signed. HTPBE checks all of these factors automatically.
Can I verify PDF authenticity without the original file?
Yes. HTPBE performs one-sided forensic analysis — you only need the document you want to verify. The tool examines internal evidence within the PDF itself: metadata timestamps, file structure, and digital signature integrity. No original reference file is required.
What types of documents can I verify?
Any PDF: invoices, bank statements, contracts, certificates, diplomas, insurance documents, legal filings. The tool works on any standard PDF up to 10 MB.
Is PDF authenticity verification free?
The web tool is completely free with no upload limits and no account required. For automated verification in your own systems, the API is available from $15/month.