Add Watermark to PDF
Custom text or image watermark. Opacity, rotation, tiling. 100% private, no upload.
Select PDF to Watermark
Click to browse or drag & drop here
Text or Image
Stamp custom text or upload a logo. Full control over colour, size, and rotation.
Tile or Position
Corner placements, center, or diagonal tiling that covers every page edge to edge.
100% Private
Everything runs in your browser. Your PDF and logo never leave your device.
No Watermark Tax
Free forever, no signup, no PDFNinja branding, no page count limits.
How to Add a Watermark to PDF
Upload your PDF
Drop the file or click to browse. It stays on your device.
Choose text or image
Type a message like CONFIDENTIAL, or upload your logo as PNG/JPG.
Style it
Set colour, opacity, rotation and pick a position or tiled pattern.
Download
Apply the watermark to every page and save the new PDF.
Frequently Asked Questions
Is the watermark applied to every page?
Yes. The watermark is stamped onto every page of the input PDF at the position and style you choose.
Does the watermark become part of the file?
Yes. It's drawn directly onto each page's content stream, so it survives copy, print, and re-export.
Will my images or logos be uploaded?
No. Both the PDF and the logo image are processed entirely in your browser using WebAssembly.
Can I remove the watermark later?
The watermark is baked into the file. Keep your original PDF if you may need an unwatermarked copy.
Are transparent PNGs supported?
Yes. Transparent PNG logos preserve their alpha channel when drawn on the page.