Validate Signature
Verify digital signatures in PDF documents. Check certificate validity, signer information, and document integrity.
Upload Signed PDF
Drag and drop a signed PDF file here, or click to browse.
About This Tool
Validate Signature allows you to verify digital signatures in PDF documents. Check if signatures are valid, view certificate information, and confirm document integrity.
Upload a signed PDF to see all signatures, their validity status, signer information, and whether the document has been modified after signing.
All validation happens locally in your browser. Your documents are never uploaded to any server.
How to Use
Upload Signed PDF
Upload a PDF document that contains digital signatures.View Results
See all signatures found in the document with their validity status.Check Details
View certificate information, signer details, and signing timestamp.Export Report
Optionally download a JSON report of the validation results.
Use Cases
Document Verification
Compliance Audit
Certificate Review
Frequently Asked Questions
A valid signature means the document has not been modified since signing and the certificate chain is intact.
Yes, you can upload multiple PDFs and validate all signatures in batch.
Signatures may be invalid if the document was modified, the certificate expired, or the certificate is not trusted.