How to Apply Custom PDF Watermarks

In this tutorial, you will learn how to apply custom watermarks to PDF documents using the IronPDF library in a C# console application. The process begins with installing IronPDF through the NuGet package manager. In the Program.cs file, essential PDF namespaces are included, and a license key is required to use IronPDF functionalities.

The tutorial demonstrates creating a watermark HTML string, which includes an image and a heading styled with HTML. This watermark is overlaid onto the PDF using a chrome PDF renderer, which converts HTML content into a PDF document. Key customization options include setting the watermark's rotation to 30 degrees and adjusting its opacity to 70% to ensure it is visible yet not overpowering. The watermark is centered on the page using vertical and horizontal alignment settings. Finally, the watermarked PDF is saved to a specified path.

Running the program successfully generates a PDF with the custom watermark, showcasing the Iron Software logo and heading, aligned and styled as specified. This tutorial is a valuable resource for anyone looking to enhance their PDF management skills using C# and IronPDF.