How to Add Digital Signature in PDF

By 99Digital Signature on April 09, 2025

In today's digital world, signing pdf documents just like Invoice and bill with digital signature is more convenient way. Whether you approve contracts, invoice or legal documents adding a digital signature to your PDF files ensures authenticity and security. A digital signature is an encrypted certificate with the signature ID of a document that has not been changed since it was signed.

Use Adobe Acrobat Reader DC

Below are step-by-step instructions for adding digital signatures to PDFs in various ways.

Adobe Acrobat Reader is one of the most frequently used tools to sign PDF documents.

1. Open the PDF in Adobe Acrobat Reader DC.
2. Click on Right side "All Tools" in the bottom and select "View more".
3. Select "Use a Certificate"
4. Click on "Digitally Sign".
5. Choose how you want to sign.
6. Draw: Use the mouse or touch screen to draw the signature.
7. Click "Sign" and place the signature on your PDF.
8. Enter Token Password
9. Save the new name document to with the digital signature.

Create digital signature on PDF , save time and protect your documents with encryption and reliability. Whether you use Adobe Acrobat DSC, online tools, or official DSC tokens, each method offers a different standard of convenience and security. Always choose a certificate-based digitally signed official or legal document to ensure compliance and validity.

Need help getting a Digital Signature Certificate? Visit 9Digital Signature to get started quickly and securely.

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