Foxit Quick PDF Library

Programmatically add a watermark or stamp to a PDF

Adding an image as a watermark or a stamp on a PDF requires only a few lines of code using Foxit Quick PDF Library. Here’s some C# sample code:

/* Add an image watermark or stamp to an existing PDF document */

// Load a sample file from disk. We'll place the image
// onto this file.

DPL.LoadFromFile("filename.pdf", "");

// Select page 1 to watermark


// Load your image into memory

DPL.AddImageFromFile("myImage.png", 0);

// Get width and height of the image

int lWidth = DPL.ImageWidth();
int lHeight = DPL.ImageHeight(); 

// Draw the image onto the page using the specified width/height

DPL.DrawImage(250, 450, lWidth, lHeight);  

// Save the updated file to the output folder


This article refers to a deprecated product. If you are looking for support for Foxit PDF SDK, please click here.

Updated on May 16, 2022

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