Digital Signature
Add X.509 digital signatures to PDF documents. Sign PDFs with PFX, P12, or PEM certificates for legal validity.
Clear file handling
Built for real workflows
Progress and feedback
Useful options, not clutter
Upload PDF to Sign
Drag and drop a PDF file here, or click to browse.
Smart workflow
Do more in the same workflow
Build from the job you started: batch compatible files, keep the right output format, then move straight into the next useful step without hunting through the site.
Input
Output
Batch
1 file per run
1 file per run. Use one run when the files share the same task.
Choose a related operation below instead of starting from scratch.
Results stay focused on download, preview and the next useful action.
No fixed file-size limit per configured tool limit.
Natural next steps
Continue with a related tool using the same file workflow.
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 ยท ZIP-ready output ยท Workflow-ready
Best when Digital Sign Pdf is only the first step in your workflow.
ContinueContinue 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.
ContinueMake the next step easier
Use Digital Sign Pdf as part of a complete document workflow: process the file, review the result, then continue into the next useful step instead of returning to a generic tools catalogue.
Clear file-to-result workflow
Useful controls without unnecessary clutter
Mobile-friendly processing experience
Continue directly into related tools
A smoother workflow
- 1Add the file for Digital Sign Pdf
- 2Choose only the settings that matter for the destination
- 3Process and review the result
- 4Continue to the next useful tool when the job is not finished
A human tip
The useful version of Digital Sign Pdf
A conversion tool is most valuable when it removes the work around the conversion. People usually arrive with a destination in mindโan upload, a submission, an email, a report, a website or another editing step. The page should make that destination obvious, keep the interface focused, and offer a sensible next action when the first operation is only part of the job.
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.