GroupDocs.Signature for .NET is a comprehensive electronic signature API enabling developers to add, modify, and remove e-signatures in digital documents and images. It supports a variety of signature types, including text, form field, stamp, image, barcode, QR code, metadata, and digital signatures that can be effortlessly added to PDF, Word, Excel, PowerPoint, ODT, ODP, ODS, OTT, OTP, OTS, PNG, BMP, JPG, GIF, TIFF, WEB, DICOM, and more. The API is a complete package for creating and manipulating electronic signatures, as it also lets developers modify the visual signature attributes, such as the signature font and color.
The unmatched feature set of the .NET electronic signature API helps you enhance document signing solutions and unlock their full potential. In addition to adding new e-signs, you can search and fetch the existing signatures in a document, retrieve document information, create image previews of the documents, and verify document signatures. GroupDocs.Signature for .NET is a great choice to sign and secure your legal, official, personal, or educational data files. It supports you in streamlining your document signing workflows and optimizing the capabilities of your apps, allowing you to discover easy integration and swift deployment of your e-signature solutions with the .NET API.
Before getting started with GroupDocs.Signature for .NET, please visit the System Requirements page to review a list of prerequisites and ensure compliance with the recommended OS, development environment, framework, and platform settings.
Please install the .NET library for signing documents by downloading the DLLs or the MSI installer from the downloads section. You can also set up the library using the NuGet package. The command for the Visual Studio package manager console is given below:
GroupDocs.Signature for .NET helps you enhance the security and authenticity of your digital documents by esigning them programmatically. The API enables you to secure legal documents and business contracts with e-signatures and protects financial data in statements and invoices. Digital signatures serve as a digital fingerprint and ensure the authenticity of your PDF documents. Similarly, image signatures add an extra layer of security to the documents while providing an outlet for personalization and branding of the Word files. In this section, we will guide you through signing PDFs using digital signatures and adding image signatures to Word documents with the help of code examples.
By inserting digital signatures, saved as digital certificates, into PDF documents, you can authenticate them and optimize the legitimacy of the PDFs. In the following C# coding example of the .NET electronic signature API, we will learn about the process in detail.
// Sign PDF with digital certificate in C#
// Load the source PDF document
using (Signature signature = new Signature("input-document.pdf"))
{
// Load digital options with the digital certificate file
DigitalSignOptions options = new DigitalSignOptions("certificate.pfx");
{
Left = 50, // Set signature position
Top = 50,
Password = "GroupDocs" // Set password
};
// Sign PDF with digital signature
signature.Sign("signed-document.pdf", options);
}
An image signature could be the brand name or an e-signature of an individual that needs to be inserted into the Word document to enhance its integrity. The following C# code example provides more insight into the process of signing DOCX files within your .NET solutions.
// Sign Word documents with JPG images in .NET
// Load the source Word (DOCX) document
using (Signature signature = new Signature("source-document.docx"))
{
// initialize image options class with image signature file
ImageSignOptions options = new ImageSignOptions("signature.jpg")
{
// set signature position
Left = 100,
Top = 100,
AllPages = true;
};
// Sign DOCX file with image
signature.Sign("signed-file.docx", options);
}
Please visit the GroupDocs.Signature for .NET GitHub examples page to check out more code examples. To help you e-sign PDF, DOCX, XLSX, PPTX, ODS, OTS, JPEG, TIFF, PNG, and more files on the fly, we provide cross-platform Free Online Document Signature Apps. Please be sure to check out the free apps today.
GroupDocs.Signature for .NET stands out as your reliable partner for seamless document and image signing in today’s fast-paced digital landscape. With this API, you can develop multi-purpose solutions to electronically sign contracts, invoices, and various business documents independently from within your .NET apps. What sets the API apart is its cross-platform support, ensuring a consistent document signing experience for you across a diverse set of operating systems and devices. On top of that, you can enjoy the freedom of having no external software dependencies. The standalone .NET electronic signature API operates autonomously without the hassle of additional installations. So, whether you're finalizing official contracts, authenticating invoices, or managing business documents, .NET API guarantees a smooth, platform-independent digital signing process.
GroupDocs.Signature for .NET is a high-performance API that allows developers to integrate electronic signature functionality into their .NET apps. The API supports various signature types to enable secure document signing, along with signature verification and appearance customization features.
Many well-known file formats are supported by the .NET API for digital signatures, such as Microsoft Word, Excel, PowerPoint, PDF, ODT, ODS, ODP, CDR, JPG, GIF, TIFF, PNG, PSD, SVG, WEBP, and WMF. Using the API, you can quickly add different electronic signatures, watermark signatures, and digital signatures to the supported document and image file formats within your .NET solutions.
Yes, we provide coding examples for the .NET electronic signature API, which are available on the GitHub examples page of the API. With the help of the coding examples, users can pick up the pace and start signing documents in no time.
Yes, GroupDocs.Signature for .NET API prioritizes the security of sensitive data. We ensure the integrity and authenticity of your documents throughout the signing process and take all required measures to provide you with a secure user experience.
Yes, the .NET e-signature library is compatible with different frameworks, platforms, and operating systems. You do not need third-party software installations to sign documents using the library.
