Image Watermark
Add a logo or brand mark to every page of a PDF.
Drop a PDF here
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How to Image Watermark
Branding your PDF documents with a logo or stamp is a professional standard for many businesses. ZimaPDF's Image Watermark tool lets you place any PNG or JPG image onto every page of your PDF with full control over size, position, and transparency — privately in your browser.
Upload your PDF
Drop your document into the upload area. The file stays on your device and is never sent to a server.
Choose your watermark image and settings
Upload a PNG or JPG logo. Set the watermark size (as a percentage of page width), opacity (how transparent it appears), position (centre, any of the four corners, or tiled), and which pages to apply it to.
Apply and download
Click Apply Watermark to embed the image permanently on every selected page and download the branded PDF instantly.
Why use ZimaPDF for image watermark?
Full Opacity and Size Control
Set opacity from subtle (10–20%) for a background brand mark to full (100%) for a clearly visible stamp. Scale the logo to any size relative to the page.
Transparent PNG Support
Use a PNG with a transparent background for a clean logo overlay. No white box around your logo — the document shows through wherever the image is transparent.
Apply to Specific Pages
Brand only the first page, only the last page, or a custom selection. Perfect for adding a company logo just to the cover sheet, or a 'Review Copy' stamp to only certain pages.
Tiled Pattern Option
Repeat the image in a tiled grid across the entire page for a security background pattern or continuous branding effect.
Frequently asked questions
What image formats can I use for the watermark?
PNG and JPG are both supported. PNG is strongly recommended if your logo has a transparent background, as JPG does not support transparency and would place a white rectangle behind the logo.
How do I make the image watermark semi-transparent?
Use the opacity control before applying. Set it to a low value (10–30%) for a subtle background brand mark, or a higher value (80–100%) for a prominent, clearly visible stamp.
Can I apply the watermark to specific pages only?
Yes. You can apply the image watermark to all pages, only the first page, only the last page, or a custom list of page numbers.
Will the watermark be permanent or can it be removed?
ZimaPDF embeds the image directly into each page's content stream rather than as a removable annotation layer. This makes it permanent in the output file and not removable by standard PDF annotation tools.
Can I tile the logo to create a repeating background pattern?
Yes. The Tiled option repeats the image in a grid pattern across the full page area, which is commonly used for creating branded or security-pattern backgrounds.
Is there a size limit for the watermark image?
There is no explicit size limit. Very large images will be scaled down to fit. For best results, use a high-resolution PNG file at the actual size you want it to appear on the page.