PDF Watermark — what it does
Stamps a text watermark such as DRAFT or CONFIDENTIAL — or your own logo image — across every page, centred, diagonal or tiled, with adjustable opacity so the underlying document stays readable.
How to use PDF Watermark
- Open the PDF.
- Type the watermark text, or upload a logo image.
- Choose the layout: centred, diagonal across the page, or tiled in a grid.
- Set opacity and font size until the mark is visible but does not hide the text underneath; preview updates as you change them.
- Export the watermarked PDF.
Worked example: sending a draft for review
A draft proposal goes to a client who forwards things around. A diagonal DRAFT mark at about 15% opacity across all 20 pages makes the status obvious on screen and on a printout, while the fee table underneath stays fully readable. When the final version is approved, export the clean file you kept and the watermark is simply absent.
At a glance
| Content | Text, or an uploaded logo image |
|---|---|
| Layouts | Centred, diagonal, or tiled |
| Controls | Opacity and font size |
| Where it runs | On-device — the logo you upload is not sent anywhere |
| Limit | A watermark is a visual mark, not protection; anyone can export a clean copy if they have the original |
Frequently asked questions
- What is PDF Watermark?
- Stamp text like CONFIDENTIAL — or your own logo image — across every page, centered, diagonal or tiled, with adjustable opacity.
- Is PDF Watermark free to use?
- Yes — PDF Watermark is free to use, with no sign-up, no install and no account.
- Does PDF Watermark upload or store my data?
- No — PDF Watermark runs entirely in your browser, so your text, files and results never leave your device.
- Do I need to install anything to use PDF Watermark?
- No — it works in any modern browser (Chrome, Edge, Firefox, Safari) with no downloads, accounts or plugins.
- Can I watermark only some pages?
- The tool is built for the common case — a status mark across a whole document. If only a section needs marking, split that section out, watermark it, and merge it back.
- Is a low-opacity watermark still visible when printed?
- At 10-20% it prints as a light grey over black text, which is usually the intent. Test one page before printing a large run, since printer profiles differ.