How to Add Digital Signatures to GIF

GroupDocs.Signature makes it easy for .NET developers to add electronic signatures to GIF files within their applications by implementing a few easy steps.

Create new instance of Signature class and pass source document path as a constructor parameter.
Instantiate the DigitalSignOptions object with required certificate and its password.
Call Sign method of Signature class and pass DigitalSignOptions to it.
Analyze SignResult result to check newly created signatures if needed.

System Requirements

GroupDocs.Signature for .NET APIs are supported on all major platforms and operating systems. Before executing the code below, please make sure that you have the following prerequisites installed on your system.

Operating Systems: Microsoft Windows, Linux, MacOS
Development Environments: Visual Studio, Xamarin, MonoDevelop
Frameworks: .NET Framework, .NET Standard, .NET Core, Mono
Download the latest version of GroupDocs.Signature for .NET from NuGet

using (Signature signature = new Signature("sample.pdf"))
{
    // initialize digital option with certificate file path
    DigitalSignOptions options = new DigitalSignOptions("certificate.pfx")
    {
        // certifiate password
        Password = "1234567890",
        // digital certificate details
        Reason = "Sign",
        Contact = "JohnSmith",
        Location = "Office1",
        // image as digital certificate appearance on document pages
        ImageFilePath = "sample.jpg",
        //
        AllPages = true,
        Width = 80,
        Height = 60,
        VerticalAlignment = VerticalAlignment.Bottom,
        HorizontalAlignment = HorizontalAlignment.Right,
        Margin = new Padding() {  Bottom = 10, Right = 10},
    };
    signature.Sign("signed.gif", options);
}

About GIF File Format

A GIF or Graphical Interchange Format is a type of highly compressed image. Owned by Unisys, GIF uses the LZW compression algorithm that does not degrade the image quality. For each image GIF typically allow up to 8 bits per pixel and up to 256 colours are allowed across the image. In contrast to a JPEG image, which can display up to 16 million colours and fairly touches the limits of the human eye. Back when the internet emerged, GIFs remained the best choice because they required low bandwidth and compatible for the graphics that consume solid areas of colour. An animated GIF combines numerous images or frames into a single file and displays them in a sequence to generate an animated clip or a short video. The colour limitations are up to 256 for each frame and are likely to be the least suitable for reproducing other images and photographs with colour gradient.

Signing Other Digital Document Formats

.NET digital signatures management API for documents and images. Add electronic signatures to some of the popular file formats as stated below.

Add Digital Signatures to GIF File

Sign your GIF files using popular digital signature types. Manipulate signature properties and set up advance signing options within documents that suit your needs.

About GroupDocs.Signature for .NET API

How to Add Digital Signatures to GIF

System Requirements

Live Demos - Online App to Add Digital Signatures

About GIF File Format

Signing Other Digital Document Formats