How to watermark a PDF
- Drop your PDF into the box.
- Type your watermark text or pick a preset (CONFIDENTIAL, DRAFT, COPY…).
- Choose the layout, angle, size, color and opacity. Optionally limit it to certain pages.
- Click Add watermark, check the preview and download.
When to use a watermark
| Watermark | Use it for |
|---|---|
| DRAFT | Documents still under review, to avoid confusion with the final version |
| CONFIDENTIAL | Internal reports, contracts and financial documents |
| COPY / SAMPLE | Copies of certificates, or sample work sent to clients before payment |
| Your name or brand | Portfolios, e-books and designs you share online |
| PAID / APPROVED | Invoices and approved documents |
Private by design
The watermark is added in your browser with the open-source pdf-lib library. Your document never leaves your device, which matters for exactly the kind of confidential files people watermark.
Frequently asked questions
Can a watermark be removed?
A text watermark is added on top of the page content and can't be removed with ordinary PDF readers. Someone with editing software could still remove it, so for sensitive documents combine watermarks with sharing controls.
What's a good watermark style?
For DRAFT or CONFIDENTIAL, use a large diagonal watermark at 15–25% opacity — visible but still readable. To deter copying of photos or designs, use the tiled option so the mark covers the whole page.
Is my PDF uploaded?
No. The watermark is added in your browser on your own device.