Signing a PDF file with a simple text signature can seem like a small step, but it often makes a big difference. Developers can validate contracts, confirm approvals, or add personal notes to reports; a text signature brings credibility and clarity to your PDFs. This guide explains how to sign PDF files with text in C#, VB.NET, or ASP.NET apps using the lightweight .NET REST API. It requires no extra software, plugins, or design tools. The process is quick, reliable, and works seamlessly across Windows, macOS, and Linux systems.

Steps to Sign PDF With Text Signature Using C# .NET

1. Install GroupDocs.Signature Cloud SDK for .NET from NuGet
2. Use the Configuration class to set up your client credentials
3. Create an object of the SignApi class
4. Configure the text signature with SignTextOptions
5. Add the source and output file settings using SignSettings
6. Send a PDF e-sign request and process it with CreateSignatures

By following these easy steps, you can add personalized text signatures to your PDF files using the REST API. It enables developers to choose where the signature appears and adjust its font, size, and color for better traceability. This flexibility makes it ideal for professionals and businesses that frequently work with digital paperwork. Signing invoices, agreements, or internal reports becomes a breeze with the Cloud API. You can automate PDF signing without manual intervention and reduce dependency on external signing apps. Since the solution operates via a REST interface, anyone familiar with basic API concepts can integrate it into their workflow.

Code to Sign PDF With Text Signature Using C# .NET

Adding text-based signatures to PDF files in C# solutions through the .NET REST API is an efficient, cost-effective way to ensure authenticity and organization. The GroupDocs.Signature Cloud .NET SDK is a simple yet reliable solution for everyday document handling. Our Cloud API allows complete control over signature styling—from text alignment and transparency to page placement. It works equally well for single files or document batches, helping you sign multiple PDFs programmatically. With cross-platform compatibility, your signed PDFs remain consistent and secure across operating systems.

To explore more e-signing options, refer to our detailed tutorial on Signing DOCX Files with Barcode Signatures Using the .NET REST API.