Validate PDF Signature — Verify Digital Signature
Check whether a PDF's digital signature is valid and whether the document has been modified.
Drag files here or click to browse
Formats: .pdf.
How to validate a PDF signature
- 1Upload your signed PDF file
- 2Click 'Validate'
- 3View the validation result
FAQ
What does a valid signature mean?
It means the document has not been modified since it was signed and the certificate is trusted.
What if the signature is invalid?
The document may have been altered after signing or the certificate may not be trusted.