Add Digital PDF Signing to .NET Apps
Apply certificate-based signatures to PDFs so recipients can verify the signer and detect changes to signed content.
PDF signing allows .NET applications to add digital signatures that associate a document with a signing certificate and help recipients check whether its signed content has changed. Developers can incorporate signing into contract approvals, invoice processing, and document delivery without requiring users to sign each file manually. Depending on the component, applications can also display signer details on the page, apply timestamps, and support multiple signatures.
Several .NET PDF components support PDF signing, including:
- DevExpress PDF Document API for .NET lets developers sign new or existing signature fields using X.509 certificates, apply multiple signatures, and customize their appearance.
- Document Solutions for PDF .NET by MESCIUS supports certificate-based digital signatures and timestamps, with incremental updates that preserve earlier signatures when additional signatures are applied.
- IronPDF for .NET by Iron Software lets developers digitally sign documents using security certificates, add visual signature stamps, and create interactive signing fields.
- Syncfusion .NET PDF Library enables developers to sign and validate PDF documents, with support for timestamps and custom signature appearances.
For an in-depth analysis of features and price, visit our comparison of .NET PDF components.