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V24.1
Office File API
Demo Application
Install NuGet Packages
Redistribution and Deployment (.NET Framework)
.NET/.NET Core Support
Cloud Integration
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Dockerize an Office File API Application
Use Office File API in .NET MAUI Applications
Backend Web/REST API for Office File API
Load and Use Custom Fonts in Office File API
Sign Office Documents
Spreadsheet Document API
Word Processing Document API
PDF Document API
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Coordinate Systems
Document Generation
PDF Graphics API
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Additional Content
Interactive Forms
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Document Security
Document Protection
Sign Documents
Printing
XMP Metadata
Examples
Excel Export Library
Snap Report API
Zip Compression and Archive API
Barcode Generation API
Unit Conversion API
API Reference
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PDF Document Security

The topics in this section describe how to use PDF save options to protect a PDF document with a password and sign the document with a digital signature.

  • Document Protection

    Protect a PDF document using both the owner and user passwords. In addition, you can optionally specify user permissions for printing, data extraction, document modification and interactive operations.

  • Sign Documents

    Apply a digital signature to a PDF document.