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Digitally Sign PDF Documents

Add Adobe-verified digital signatures with custom certificates. Ensure document integrity and authenticity.

or drag and drop file here

Your PDF and certificates are processed securely on our server.

Adobe Compatible

Signatures verified by Adobe Acrobat.

Integrity Protection

Detect any modifications after signing.

Custom Certificates

Generate or upload your own certificates.

How to Sign PDF with Digital Signature

Add legally verifiable digital signatures to your PDF documents. Adobe Acrobat recognizes our signatures and verifies document integrity automatically.

Step-by-Step Guide to Sign PDFs:

  1. Upload PDF: Click "Upload PDF File" or drag your PDF into the upload zone.
  2. Generate/Upload Certificate: Create a self-signed certificate with custom details or upload an existing one.
  3. Configure Signature: Choose visible or invisible signature, add reason, location, and contact details.
  4. Sign & Download: Apply signature and download your signed PDF verified by Adobe Acrobat.

Why Use Digital Signatures?

  • Legal Validity Digital signatures are legally binding in many jurisdictions with proper certificates.
  • Adobe Acrobat Verified Signatures show as "valid" in Adobe Acrobat with cryptographic verification.
  • Document Integrity Any modifications after signing are automatically detected and flagged.
  • Custom Branding Add your name, organization, email, and location to every signature.

Frequently Asked Questions

Will my signature be valid in Adobe Acrobat?

Yes! Self-signed certificates show as cryptographically valid with integrity protection. For fully trusted signatures (green checkmark), use a CA-issued certificate.

Can I customize the certificate information?

Absolutely! You can customize all 8 fields: common name, organization, department, email, country, state, city, and validity period. All fields appear in Adobe Acrobat.

What if someone modifies my signed PDF?

Adobe Acrobat will immediately show a warning that the document has been altered or corrupted since signing, protecting document integrity.

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