How to Sign PDF Files in C# Using IronPDF

This tutorial provides a comprehensive guide on how to sign PDF files in C# using IronPDF. Start by installing IronPDF via the NuGet package manager. Then, move to the Program.cs file to include necessary namespaces: IronPdf, IronPdf.Signing, and IronSoftware.Drawing for image manipulation. Set your IronPDF license key, whether it's trial or paid, to proceed.

The tutorial demonstrates converting HTML to PDF using the Chrome PDF renderer, saving it as 'signed.pdf'. The core of the lesson focuses on creating and setting up a digital signature. You'll learn to create a PDF signature object, provide the digital signature path, and input the password. IronPDF allows for detailed signature information, including signature date, contact, location, and reason for signing.

Additionally, you will learn to configure a timestamp server URL and set the signature image property with the path and dimensions for the signature image. Signing the PDF document is done using the SignPdfFile method on the PDF signature object. After executing the program, the signed PDF can be examined to verify the validity of signatures and review details like date, location, and reason for signing.

The tutorial concludes by encouraging viewers to explore IronPDF further with a trial link provided in the video description.

Further Reading: Digitally Sign a PDF Document