iOS PDF signature library
Nutrient iOS 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, or 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
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
Biometric digital signatures
How to create a digital signing solution based on biometric data
Digital signature customization
How to customize the digital signing experience
Custom digital signers
How to sign a document using your own encryption
Contained digital signatures
Learn about splitting the signing workflow into two phases
Legacy built-in digital signatures UI
Learn about the digital signatures UI available before 1 May 2021