Watermark PDF
Add custom text watermarks to every page of your PDF document.
100% private — processed on your deviceDrop your files here
or click to browse — add as many as you like
Watermark options
LightDark
Local processing
Files never leave your device
Add a text watermark to every page of your PDF — set the wording, position, opacity, font size, and rotation. PDF Bunker stamps the file in your browser, so it is never uploaded.
How it works
- 1Drop your PDF into the upload area, or click to browse for it.
- 2Type your watermark text, such as DRAFT or CONFIDENTIAL.
- 3Adjust the font size, color, opacity, and position to suit your document.
- 4Click Add Watermark to apply it to every page and download the result.
Frequently asked questions
Is my PDF uploaded to add a watermark?
No. The watermark is applied entirely in your browser, so your document never leaves your device.
Is the watermark added to every page?
Yes. Your chosen text is stamped onto every page at the position and opacity you set.
Does it work offline?
Yes — once the page has loaded, you can watermark a PDF with your internet disconnected.
Is there a file-size limit?
Free use is capped at 25 MB per file. Pro ($5/mo) removes the cap and adds batch processing for many files at once.