Verify digital signature
Inspect the signature dictionary of a PDF to see the signer name, reason, sub-filter and date. This is a structural inspection, not a full PKI verification.
Drop a signed PDF here
or click to choose a file
Accepted: PDF · No upload
What this tool shows
- Whether a signature dictionary is present
- Signer name, reason and location if recorded
- Signature sub-filter (e.g. adbe.pkcs7.detached)
- Whether ByteRange is defined
- Whether DocMDP is present
What this tool cannot do
- Verify the certificate chain against a trust anchor
- Verify the timestamp authority signature
- Confirm the document has not been modified since signing
Privacy
Runs in your browser. No upload.
Known limitations
- This is structural inspection only. For authoritative verification, use a dedicated digital signature service.
Frequently asked questions
Does this tool actually verify the signature?
No. It inspects the signature dictionary structure and metadata. It does not perform full PKI chain validation or integrity checks.
Where can I get authoritative verification?
Use Adobe Acrobat Pro, DocuSign or your national eID provider for authoritative digital signature verification.