How to Sign a PDF Document with Digital Signature?

This article describes the process of signing a document locally using our digital signature feature.

For a clarification between local signatures and electronic signatures click here.

As of the release of Soda PDF Anywhere, we now provide you the ability to add multiple local signatures to a document. You can even add a signature to a document signed by another PDF application.

Soda PDF Desktop

If you have not already done so, you will need to configure the digital signature(s) you would like to use. Click here for more information.

  • In the Secure Module choose Digital Signature.


  • Click on the dropdown under Appearance in order to choose the aesthetic of your signature.




  • Toggle the switch under Time Stamp to display it. You will see it update in the previewer.




  • Pick the Certificate you would like to use from the list.




  • In the dropdown under Reason, you can express why you are signing.




  • Click on Sign to proceed.


  • Move your mouse cursor onto your document and you will see the outline of your signature.
  • Left-click to place it.


  • Choose a location to save the new signed document.
  • Name the file and choose Save.

Once the file is saved, it will be updated with your signature. You can repeat this process as many times as you would like.


We also have the E-Sign module that allows you to electronically sign PDFs and track and manage e-signatures in real time.

If the E-Sign module is not available for you, you can purchase it here.



Soda PDF Online

At this time the digital signature feature is unavailable in Soda PDF Online. Our development team is investigating ways to create local signatures in a web browser setting.

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