About GroupDocs.Signature for .NET

Electronic signature controls for ASP.NET, C# or VB.NET apps.

GroupDocs.Signature for .NET is an API that helps you build applications that can sign digital business documents, spreadsheets, presentations, images and PDF files. You can use several types of signature including text, image, barcode and QR-code to digitally secure your files. The digital signature API, allows you to fetch all registered certificates and it gives you advanced search options to quickly locate your required signatures. It also includes an option to customize signature properties, such as, dimensions, shadow, alignment and more.

Supported File Formats

Microsoft Office formats

  • Word: DOCX, DOC, DOCM, DOT, DOTX, DOTM, RTF
  • Excel: XLSX, XLS, XLSM, XLSB, XLTM, XLT, XLTM, XLTX, XLAM, SXC, SpreadsheetML
  • PowerPoint: PPT, PPTX, PPS, PPSX, PPSM, POT, POTM, POTX, PPTM

Images & Other Formats

  • Portable: PDF
  • Images: JPG, BMP, PNG, TIFF, GIF, DICOM, WEBP
  • Other office formats: ODT, OTT, OTS, ODS, ODP, OTP, ODG

Other formats

  • Web: HTML, MHTML
  • Archives: ZIP, TAR, 7Z
  • Certificates: PFX

GroupDocs.Signature for .NET Features

  • Document signing - Add one or multiple supported types of signatures accurately at any specified position on business documents.
  • Customize signatures - Utilize features such as color, font, border, rotation, etc., to configure the appearance of signatures.
  • Document password protection - Secure certain document types by setting a password after signing.
  • Protection from changes - Prevent changes to important business documents after appending a signature with a digital certificate.
  • Convert signed files to other formats - Convert signed files to desired formats, such as saving a Word document as a PDF.
  • Extract page previews - Extract pages from signed documents as individual images for future processing.
  • Signature search in documents - Retrieve information about previously added signatures in specific documents.
  • Validate signed documents - Verify the proper signing of documents using validation features.
  • Update or delete signatures - Easily reposition specific signatures on a page, modify their text, or delete them without any issues.