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GroupDocs Signature library provides ability to manipulate with different electronic signature types such as Text, Image, Digital, Barcode, QR-code, Stamp, Form Field, Metadata. These e-signatures could be added to document, updated, deleted, verified or searched inside already signed documents. Our product also provides information about document type and structure - file type, size, pages count, etc. and generates document pages preview based on provided options.

Here are main GroupDocs Signature API concepts:

• Signature is the main class that contains all required methods for manipulating with document e-signatures.
• Most part of methods expects different options to eSign document, verify and search electronic signatures inside document.

Please check detailed examples of how to eSign documents, search and verify document signatures in the following guides:

• Get supported file formats
• Get document information
• Electronic signature types
• Search for electronic signatures in document
• Verify document for signatures
• Generate document pages preview
• Update signatures in documents
• Delete signatures from documents