Security & Privacy
Add a Watermark to a PDF
Mark documents as confidential, draft or copyrighted, or stamp your logo on every page. Choose text or a PNG or JPG image, set its size, angle, opacity and position, preview it on your pages and apply it to the whole document.
- Runs in your browser — no upload
- Free — no sign-up
How to use Watermark PDF
- 1Open the PDF you want to watermark.
- 2Choose Text and type the watermark, or choose Image and pick a PNG or JPG; adjust size, opacity, rotation and position.
- 3Select “Add watermark” and download the stamped PDF.
Why use Watermark PDF on PDF NOVA
Files stay on your device
Processing happens in your browser. Your document is never uploaded to a server, so there is nothing to delete afterwards.
Subtle or bold
Tune opacity and angle so the watermark is clearly visible without making the page hard to read.
Logos with transparency
An image watermark keeps the transparent parts of a PNG, can sit in a corner, in the centre or be repeated across the page, and is stored once in the file.
No sign-up, no watermark
Open the page and start working. Results are clean PDFs with no branding added.
Processing on your device
Watermark PDF processes your file in your browser on your device. The file is not uploaded for processing. Download the result to keep a permanent copy. Your active PDF is saved locally in this browser for recovery across refreshes. Close Document removes it; recovery expires after 24 hours and is cleaned up when PDF NOVA next opens. Unsaved changes are not restored.
Related PDF tools
Frequently asked questions
Is Watermark PDF free?
Yes. Watermark PDF is free to use without an account and does not add a watermark to your file.
Are my files uploaded anywhere?
No. This tool runs entirely in your web browser using JavaScript and Web Workers. The file is read from your device, processed in memory and saved back to your device.
Can I use my logo as a watermark?
Yes. Choose Image, pick a PNG (transparency is kept) or JPG, and set its size as a share of the page width, its opacity, angle and position. Other image types are converted to PNG in your browser first.
Can the watermark be removed?
The watermark is drawn into the page content. Determined users with editing software may still remove it, so combine it with Protect PDF for sensitive files.