About this tool
PDF Image Watermark places a PNG or JPG on selected pages. Use it to add a logo, graphic, or other visible mark.
How to use it
- Choose a PDF, then choose a PNG or JPG watermark image.
- Set the image width, opacity, position, and margins.
- Choose all pages or enter page numbers or ranges.
- Generate the new PDF, then check the image size and placement in the download.
Features
- The watermark keeps its original aspect ratio without stretching.
- Transparent PNGs keep their alpha channel, and you can also adjust overall opacity.
- Choose the center or any corner, and use margins to control the distance from the page edges.
- The image is saved in the final PDF and added only to selected pages.
Page range format
- Pages start at 1. Enter 1, 1,3,5, 1-5, or 1-3,7,10-12. Use all for every page, odd for odd-numbered pages, and even for even-numbered pages.
- Zero, out-of-bounds pages, reversed ranges such as 5-2, letters, and empty entries such as 1,,3 are invalid. Both endpoints of a range are included.
- Extracting, deleting, and rotating ignore duplicate page numbers. Duplicating keeps repeated page numbers and builds the copied block in the order entered.
Choosing a watermark image
- A transparent PNG works well for logos without a background. JPG does not support transparency.
- Consider the image resolution and placement size. Small images may look blurry when enlarged.
Limits
- Files over 50 MiB display a memory notice. Each PDF can be up to 200 MiB. Complex content also uses memory, so choose files that suit your device.
- Password-protected and encrypted PDFs are not supported. Use an unencrypted copy you are authorized to access. Damaged or unsupported files may not open.
- Editing a digitally signed PDF may invalidate its signature. Keep the original file.
- Bookmarks, interactive forms, annotations, and other complex features may not be fully preserved. Open the download and check its pages and important content.
Privacy
Your PDF is processed entirely in your browser and is never uploaded to a server.
Images, text, and generated results are also processed only in your current browser. Your input is not saved automatically. Download any results you want to keep before clearing or leaving the page, and keep your original files.
FAQ
Can I use a transparent PNG logo?
Yes. Transparent areas are preserved and combined with your chosen overall opacity.
Will images be stretched?
No. The height is calculated from the original proportions when you set the width.
Can I add it to only some pages?
Yes. Enter specific pages or ranges, such as 1-3,5.
Is the watermark saved in the download?
Yes. It becomes part of the new PDF's page content. Editing a signed file may invalidate its signature.