GroupDocs.Signature (nuget): GroupDocs.Signature for .NET is a comprehensive library that allows you to sign PDF, Word, Excel, JPG, and Presentation documents using various electronic signatures like text, image, barcode, QR code, metadata, form field, and digital signatures.  With this API, you can also create, search, and verify electronic signatures for popular document formats, and customize your signing options to fit your needs. Features:     * eSign documents with electronic signatures         - Digital - signatures based on a certificate file;         - Barcode - adds barcode to document pages (over 60+ different types)             * UPC;             * Code 39;             * Code 128;             * EAN;             * ITF;             * Codebar;             * EAN;             * ISBN;             * MSI.         - QR-code - generate QR-code to document pages with ability to embed encrypted data into QR-code             * Aztec;             * DataMatrix;             * QR;             * GS1DataMatrix;             * GS1QR.         - Metadata - create or update any data types as hidden document content in a document metadata in a dictionary manner with unique key;         - Text - different type of text object like text stamp, labels, annotations, watermarks ;         - Image - places an image to document page;             * Text as image;             * Image - various graphics, figures and polylines.         - Stamp - adds various kind of stamps to document as different stamp shapes circle or rectangle;         - Form Field - fills document form fields with provided data (for PDF documents only).     * Search electronic signatures ine the document with specific criteria or particular signature type             * Verify - checks that document contains signatures that meet the specified criteria.     * Modify - update or delete text, image, barcode, QR cide signatures in the documents     * Styling - wide settings range for visualization effects such as text and image opacity, colors, fonts, rotation and other effects;     * Document basic information - basic metadata for provided source document (size, page count, file type, created/modified dates etc.).  Supported document formats:     * Portable Document Formats - PDF (PDF/A-1a, PDF/A-1b, PDF/A-2a)     * Microsoft Word documents - DOC, DOCX, DOCM, DOT, DOTX, DOTM, RTF     * Microsoft Excel spreadsheets - XLS, XLSX, XLSM, XLSB,     * Microsoft PowerPoint presentations - PPT, PPTX, PPS, PPSX, PPTM, POTX, POTM, PPSM;     * Open Document formats - ODT, OTT, ODS, OTS, ODP, OTP;     * Image - TIFF, TIF, JPG, JPEG, PNG, GIF, BMP, ICO, JP2, J2C, J2K, JPF, JPX, JPM, WMF, EMF, WEBP, PSD;  For more details on the GroupDocs.Signature for .NET API, please visit product website at: https://products.groupdocs.com/signature/net  Note: GroupDocs.Signature for .NET will run in evaluation mode. In order to test full features of the product, please request a free 30-day temporary license.
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