UWP digital signature library
Nutrient UWP SDK is a library for signing PDF documents with an electronic signature or with encrypted certificate-based digital signatures. It offers developers an API to create, validate, and display digitally signed documents, as well as a beautiful UI for hand-drawn electronic signatures.
Key capabilities
Digitally sign by using a private key
Verify certificates and signatures
Add drawn, scanned, and typed electronic signatures
Store locally or remotely for future reuse
Trigger workflows or automations
Hide buttons, match your look and feel, and more
Sign PDFs directly in the browser (no server needed)
Add forms, annotation, editing, and more


Introduction to signatures
Nutrient facilitates paperless signing workflows with the Electronic Signatures and Digital Signatures components. These are two components that can be licensed separately and don’t depend on each other.
Electronic signatures

Add an ink electronic signature
How to add an electronic signature (eSignature) to a PDF document

Electronic signature storage
How to implement a mechanism for storing signatures

Electronically sign with a certificate
How to use electronic signatures and digital signatures together

Electronic signatures UI
How to configure signature creation modes and signature fonts
Digital signatures

Supported digital signature methods
Learn about supported digital signing methods and algorithms

Generate a certificate
How to generate a self-signed certificate for testing purposes

Add a digital signature
How to add a digital signature to a PDF document

Validate digital signatures
How to validate digital signatures