Check If a PDF Was Edited
HTPBE.tech is a free online tool that tells you whether a PDF has been edited (yes/no). Upload any PDF and get an instant answer — no registration, no software, no cost.
Results in under 5 seconds. Free. No account needed.
How to Tell If a PDF Has Been Edited
Every PDF carries hidden evidence of its history. Here is what to look for.
Modification date after creation date
Every PDF contains an internal clock. If the modification timestamp is days, months, or years after the creation date, the document was changed after it was originally made.
Creator and producer application mismatch
A legitimate PDF created entirely in Microsoft Word should show Word in both fields. If Adobe Acrobat appears as the producer on a Word-created file, something edited it afterward.
Incremental update sections
When a PDF is edited, the changes are often appended as a new revision layer rather than rewriting the file. Multiple revision layers are a direct structural sign of post-creation editing.
Removed or invalidated digital signature
If a document was digitally signed and that signature was later removed or became invalid, it is a strong indicator that the content was altered after signing.
The Easy Way: Use HTPBE
All checks run automatically in seconds — no technical knowledge required.
Upload your PDF
Drag and drop any PDF file up to 10 MB onto the checker.
Instant forensic analysis
HTPBE examines metadata, file structure, revision history, and digital signatures — all in under 5 seconds.
Get a clear answer
Receive a yes/no verdict, a risk score (0–100), and a list of specific findings explaining what was detected.
Frequently Asked Questions
Can I check if a PDF was edited for free?
Yes. The HTPBE web tool is completely free and unlimited. You can check as many PDFs as you need without creating an account.
How accurate is the PDF edit detection?
HTPBE uses multiple layers of forensic analysis and returns a risk score from 0 to 100 with a confidence level. No automated tool provides 100% certainty — deliberate sophisticated forgeries may evade detection — but the tool reliably catches the most common editing methods.
How long does checking a PDF take?
Under 5 seconds for most files up to 10 MB.
Is my PDF stored after checking?
No. Files are processed for analysis and not stored permanently. Your document stays private.