Digital Signature
Add X.509 digital signatures to PDF documents. Sign PDFs with PFX, P12, or PEM certificates for legal validity.
Loading only the code needed for this tool…
PDF security
Choose the protection that matches the document
Security operations can add or remove access controls, sanitize data or flatten interactive content. Confirm that the result behaves as intended before sending it to another person or system.
Input
Output
Batch
1 file per run
1 file per run. Only use one run when files share the same operation.
Move into a related operation instead of re-finding the tool.
Download a destination-ready result and verify it before sharing.
Configured runtime limit applies.
Natural next steps
Continue with a related tool using the same file workflow.
Process one source at a time
Review the result before sharing
Smart workflows
Finish the job, not just the file
Use the existing tool graph to continue into useful next steps. Bulk and output-packaging capabilities are surfaced automatically where the underlying tool supports them.
Continue with Validate Signature
Bulk-readyFinish the job after Digital Sign Pdf with a relevant MAXScanner tool, without creating a duplicate converter page.
- Digital Sign Pdf
- Validate SignatureBulk processing · ZIP-ready output · Workflow-ready
Best when Digital Sign Pdf is only the first step in your workflow.
Continue with Encrypt Pdf
Finish the job after Digital Sign Pdf with a relevant MAXScanner tool, without creating a duplicate converter page.
- Digital Sign Pdf
- Encrypt PdfWorkflow-ready
Best when Digital Sign Pdf is only the first step in your workflow.
About This Tool
Digital Signature allows you to add cryptographic X.509 digital signatures to PDF documents. Unlike simple drawn signatures, digital signatures provide legal validity and document integrity verification.
Upload your certificate file (PFX, P12, or PEM format), enter the password, and sign your PDF. You can add visible signatures with custom text, images, and positioning, or invisible signatures for document integrity only.
All signing happens locally in your browser. Your certificate and documents are never uploaded to any server.
How to Use
Upload PDF
Upload the PDF document you want to digitally sign.
Load Certificate
Upload your X.509 certificate file (.pfx, .p12, or .pem) and enter the password.
Configure Signature
Optionally add reason, location, and visible signature with custom text or image.
Sign and Download
Click Sign PDF to apply the digital signature and download the signed document.
Use Cases
Legal Documents
Sign contracts, agreements, and legal documents with legally binding digital signatures.
Business Approvals
Digitally sign invoices, purchase orders, and approval documents for audit trails.
Document Integrity
Ensure documents have not been tampered with after signing.
Frequently Asked Questions
What certificate formats are supported?+
PFX (.pfx), PKCS#12 (.p12), and PEM (.pem) certificate formats are supported.
Is the signature legally valid?+
Yes, X.509 digital signatures are legally recognized in most jurisdictions when using a valid certificate.
Can I add a visible signature?+
Yes, you can add a visible signature with custom text, image, position, and styling.