How to Sign a PDF with a Certificate
1. Upload Files
Select your PDF and your digital certificate file (.p12 or .pfx).
2. Enter Details
Provide your certificate password and optional signing details.
3. Apply Signature
Click the button to embed a secure digital signature field.
4. Download & Finalize
Download the PDF and click the signature field in Acrobat to finalize.
Key Features
- Legally Binding Signatures: Apply a P12 or PFX digital certificate to create a verifiable and legally recognized signature.
- Signature Metadata: Include the reason for signing, contact information, and location to add context to your signature.
- Document Integrity: A digital signature cryptographically locks the document, proving it hasn't been altered since it was signed.
- Secure Processing: Your private certificate and password are handled securely in your browser and are never uploaded.
- Standard Compliance: Creates standard digital signature fields compatible with Adobe Acrobat and other major PDF viewers.
Use Cases
Execute contracts, NDAs, and legal agreements with a secure, verifiable digital signature that is more secure than a simple image signature.
Sign off on financial reports, audit statements, and invoices to ensure document authenticity and integrity.
Submit official documents, permits, and regulatory filings that require a high-assurance digital signature for compliance.
Tips & Best Practices
Keep Your Certificate Secure
Your digital certificate (.p12, .pfx) is like a digital passport. Store it securely and never share your private key password.
Finalize Document Before Signing
A digital signature locks the document. Ensure all editing is complete before you sign, as any subsequent changes will invalidate the signature.
Frequently Asked Questions
Related Tools
Need Legally-Binding Signatures?
Apply a high-assurance digital certificate to your PDFs for maximum security and authenticity. Try our free and secure tool now!