GroupDocs.Signature 20.5.0

.NET Standard 2.0 .NET Framework 2.0
There is a newer version of this package available.
See the version list below for details.
Install-Package GroupDocs.Signature -Version 20.5.0
dotnet add package GroupDocs.Signature --version 20.5.0
<PackageReference Include="GroupDocs.Signature" Version="20.5.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add GroupDocs.Signature --version 20.5.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: GroupDocs.Signature, 20.5.0"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install GroupDocs.Signature as a Cake Addin
#addin nuget:?package=GroupDocs.Signature&version=20.5.0

// Install GroupDocs.Signature as a Cake Tool
#tool nuget:?package=GroupDocs.Signature&version=20.5.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

.NET API for Document Signature

This on-premise .NET API lets your app end-users sign the electronic documents from a wide range of file formats. Supports several types of e-signing methods.

Document Signature Processing Features

  • Create and add signatures to documents of various file formats.
  • Specify visual attributes of signatures, such as, color, font, margins etc.
  • Search and fetch list of signatures from a document.
  • Determine if the document contains signatures meeting a specified criteria.
  • Extract basic information about the document.
  • Generate image representation of document pages for preview.
  • Distinguish created signatures from the actual document.
  • Put encrypted text into QR-code signature or embed custom data objects.

New Features in Version 20.5

  • Implemented support of digitally signing the presentation document types.
  • Implemented support of digital signature verification for presentation document types.
  • Implemented support of digital signature search for presentation document types.
  • Implemented Metadata values convertion across various types.

Enhancements in Version 20.5

  • Implemented property XAdES for Digital Signature.
  • Set up additional properties for digital signatures in SignResult.
  • Implemented support of XAdES signatures for Spreadsheet documents for .Net Standard.
  • Update using Transparency property of Text and Image Options.

Removed Features in Version 20.5

  • Removed support of signing .PSD files.

Public API and Backward Incompatible Changes

  • Public class DigitalSignature is updated with new properties and ability to set XAdES type. Supported only for Spreadsheet documents.
  • Public class MetadataSignature is updated with new conversion methods to retrieve its values with various data types.
  • Public class PdfDigitalSignature property string Authority is marked as obsolete and will be removed since 20.9 version.

For the detailed notes, please visit GroupDocs.Signature for .NET 20.5 Release Notes.

Signature Supported Formats

The following section lists the supported file formats for the barcode, image, QR-code, stamp, and text signature types: Microsoft Word: DOC, DOCM, DOCX, DOT, DOTM, DOTX Microsoft Excel: XLSX, XLS, XLSB, XLSM, XLTX, XLTM Microsoft PowerPoint: PPTX, PPTM, PPT, PPSX, PPSM, PPS, POTX, POTM OpenOffice: ODT, OTT, ODS, OTS, ODP, OTP Image: BMP, GIF, JPG, JPEG, PNG, SVG, TIF, TIFF, WEBP CorelDraw: CDR, CMX Photoshop: PSD eBook: DJVU Metafile: WMF Portable: PDF

Digital Signature Supported Formats

Microsoft Word: DOC, DOCM, DOCX, DOT, DOTM, DOTX Microsoft Excel: XLSX, XLS, XLSB, XLSM, XLTX, XLTM OpenOffice: ODS, OTS Portable: PDF

FormField Signature Supported Formats

Microsoft Word: DOC, DOCM, DOCX, DOT, DOTM, DOTX Microsoft Excel: XLSX, XLS, XLSB, XLSM, XLTX, XLTM OpenOffice: ODS, OTS, ODP Portable: PDF

Metadata Signature Supported Formats

Microsoft Word: DOC, DOCM, DOCX, DOT, DOTM, DOTX Microsoft Excel: XLSX, XLS, XLSB, XLSM, XLTX, XLTM Microsoft PowerPoint: PPTX, PPTM, PPT, PPSX, PPSM, PPS, POTX, POTM OpenOffice: ODT, OTT, ODS, OTS, ODP, OTP Image: JPG, JPEG, PNG, SVG, TIF, TIFF Photoshop: PSD Portable: PDF

Supported Signature Types

  • Text stamps
  • Text labels
  • Text as image signature
  • Image signature
  • Digital signature
  • Barcode signature
  • QR-code signature
  • Metadata signature
  • Form-field signature

Platform Independence

GroupDocs.Signature for .NET does not require any external software or third party tool to be installed. GroupDocs.Signature for .NET supports any 32-bit or 64-bit operating system where .NET or Mono framework is installed. The other details are as follows:

Microsoft Windows: Microsoft Windows Desktop (x86, x64) (XP & up), Microsoft Windows Server (x86, x64) (2000 & up), Windows Azure Mac OS: Mac OS X Linux: Linux (Ubuntu, OpenSUSE, CentOS and others) Development Environments: Microsoft Visual Studio (2010 & up), Xamarin.Android, Xamarin.IOS, Xamarin.Mac, MonoDevelop 2.4 and later. Supported Frameworks: GroupDocs.Conversion for .NET supports .NET and Mono frameworks.

Getting Started with GroupDocs.Signature for .NET

Are you ready to give GroupDocs.Signature for .NET a try? Simply execute Install-Package GroupDocs.Signature from Package Manager Console in Visual Studio to fetch & reference GroupDocs.Signature assembly in your project. If you already have GroupDocs.Signature for .Net and want to upgrade it, please execute Update-Package GroupDocs.Signature to get the latest version.

Please check the GitHub Repository for other common usage scenarios.

Sign a PDF File and Save it in DOCX Format using C# Code

using (Signature signature = new Signature("sample.pdf"))
    // create QRCode option with predefined QRCode text
    QRCodeSignOptions signOptions = new QRCodeSignOptions("JohnSmith")
        EncodeType = QRCodeTypes.QR,
        Left = 100,
        Top = 100
    PdfSaveOptions pdfSaveOptions = new PdfSaveOptions()
        FileFormat = PdfSaveFileFormat.DocX,
        OverwriteExistingFiles = true
    // sign document to file
    signature.Sign("SignedPdf.docx", signOptions, pdfSaveOptions);

Use C# to Search and Delete Signatures from DOCX File

// initialize Signature instance
using (Signature signature = new Signature("signed.docx"))
    BarcodeSearchOptions options = new BarcodeSearchOptions();
    List<BarcodeSignature> signatures = signature.Search<BarcodeSignature>(options);
    List<BaseSignature> signaturesToDelete = new List<BaseSignature>();
    // collect signatures to delete
    foreach (BarcodeSignature temp in signatures)
        if (temp.Text.Contains("John"))
    // delete signatures
    DeleteResult deleteResult = signature.Delete(signaturesToDelete);
    if (deleteResult.Succeeded.Count == signaturesToDelete.Count)
        Console.WriteLine("All signatures were successfully deleted!");
        Console.WriteLine($"Successfully deleted signatures : {deleteResult.Succeeded.Count}");
        Console.WriteLine($"Not deleted signatures : {deleteResult.Failed.Count}");
    Console.WriteLine("List of deleted signatures:");
    foreach (BaseSignature temp in deleteResult.Succeeded)
        Console.WriteLine($"Signature# Id:{temp.SignatureId}, Location: {temp.Left}x{temp.Top}. Size: {temp.Width}x{temp.Height}");

Product Page | Documentation | Demo | API Reference | Examples | Blog | Free Support | Temporary License

Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net20 net35 net40 net403 net45 net451 net452 net46 net461 net462 net463 net47 net471 net472 net48
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on GroupDocs.Signature:

Package Downloads

Conholdate.Total for .NET is a complete package to work with a large number of file formats from Microsoft Word, Excel, PowerPoint, Outlook, Project, Visio, Adobe Acrobat, Illustrator, Photoshop, AutoCAD, OpenOffice and many more. Conholdate.Total for .NET allows you to use any API released under Aspose and GroupDocs for .NET in order to create, convert, read, edit, update and print popular document formats. Moreover, you may view, annotate, watermark, assemble, classify, search, redact, parse, merge and compare documents without needing to install the native applications. It helps you in file format manipulation and document automation via simple API. Conholdate.Total for .NET also includes specialized APIs to read and create barcodes, extract text from images using OCR as well as extract human marked data from questioners, surveys, quizzes, MCQ papers and feedback forms.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
22.4.0 583 4/6/2022
21.11.0 1,513 12/1/2021
21.9.0 2,553 9/30/2021
21.7.0 1,507 8/1/2021
21.6.0 1,006 6/29/2021
21.4.0 1,002 5/3/2021
21.3.0 1,057 3/31/2021
21.1.0 3,317 1/28/2021
20.11.0 1,517 11/30/2020
20.10.0 1,603 11/2/2020
20.9.0 1,316 9/30/2020
20.8.0 1,188 9/1/2020
20.7.0 1,177 8/2/2020
20.6.0 2,282 7/1/2020
20.5.0 1,664 5/31/2020
20.4.0 2,490 4/30/2020
20.3.0 1,532 3/31/2020
20.2.0 1,744 2/29/2020
20.1.0 1,135 2/3/2020
19.12.1 727 1/10/2020
19.12.0 859 12/30/2019
19.10.0 1,023 10/31/2019
19.9.0 369 9/30/2019
19.8.0 460 8/23/2019
19.6.0 786 6/27/2019
19.5.0 884 5/30/2019
19.4.0 450 4/30/2019
19.3.0 506 3/30/2019
18.7.1 775 8/1/2018
18.7.0 715 7/30/2018
18.6.0 857 6/20/2018
18.5.0 683 5/30/2018
18.3.0 815 3/21/2018
18.2.0 863 2/19/2018
18.1.1 792 1/22/2018
18.1.0 801 1/21/2018
17.12.0 779 12/7/2017
17.11.0 757 11/7/2017
17.10.0 754 10/3/2017