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PDF Security documentation

Secure PDFs with Pdftools SDK

This product has been replaced by the Pdftools SDK.
You can secure PDFs by adding digital signatures. See Sign PDF documents in the Pdftools SDK documentation.

PDF Security is an SDK that enables you to add digital signatures to PDF documents, encrypt and, if the passwords are known, decrypt PDF documents. It can set and cancel all known PDF user authorizations.


Use the command line to add digital signatures and encrypt PDFs.


Send API calls to add digital signatures and encrypt PDFs.

See it in action!

Check out the code samples for examples on how to use PDF Security.

Documentation for other versions

PDF Security is no longer available as a service. For existing customers, access the Service version developer guide.