Verify PDF signatures
Check the digital signatures in a PDF.
- Add files
- Options
- Convert
- Review
Runs on your device. Your file is not uploaded.
How to use Verify PDF signatures
- Choose or drop one signed PDF.
- Every digital signature is checked on your device.
- Read whether each one is intact, who the certificate names, and whether anything was added after signing.
Does a valid result prove who signed?
No. It proves the signed part of the file hasn't changed. We don't check trust lists or whether a certificate was revoked, so the name shown is only what the certificate claims.
Works well with Verify PDF signatures
Explore all Secure tools- Digital signatureSign a PDF digitally with your own certificate file (P12 or PFX).
- Verify signed documentCheck a signed document against its signing record to see if it changed.
- Audit trailReview and export the recorded events for an agreement as an audit report.
- Protect PDFEncrypt a PDF with a password so only people who know it can open it.
- PDF to PDF/AMake an archive-ready PDF/A copy of your document and check how it conforms.
- Compare PDFPut two versions of a PDF side by side and see what changed.
Put your pages in order
Merge, split, reorder, rotate and number pages. All on this device.
Runs in your browser, so your file is not uploaded.
Questions
Does a green result prove who signed?
No. It proves the file hasn't changed since signing. We don't check trust lists or revocation, so who signed is only what the certificate says.
Are my files uploaded?
Runs in your browser, so your file is not uploaded.
Is Verify PDF signatures free?
Yes. No signup and no watermark.
Will it work on an old phone?
Yes for most files. On low-memory phones files up to 20 MB are safest; above your device's limit you get a warning and can try anyway.
Does it work on Mac, Windows, iPhone and Android?
Yes. It runs in any current browser, so there is nothing to install on any of them.