PDF Watermark
Stamp DRAFT, CONFIDENTIAL or your own text across every page before you share a document — so a leaked copy always says where it came from.
Drop your PDF here
or click to browse · watermarked locally, never uploaded
Something not working?
Tell us what went wrong — it helps us fix the tool. Only what you type below is sent; your files never leave your device.
Need more power? Meet PDF Watermark Pro
One-time payment. Yours forever. No subscription.
| Feature | Free | Pro |
|---|---|---|
| PDF size / pages | Up to 50 MB · 200 pages | Unlimited |
| Diagonal & tiled watermarks | Yes | Yes |
| Opacity, size & colour controls | Yes | Yes |
| Watermarked PDF download | Yes | Yes |
| Image / logo watermark | — | Yes |
| Batch-watermark several PDFs | — | Yes |
| Ads | Shown on page | Ad-free |
| Updates | — | Lifetime free updates |
Frequently asked questions
Is my PDF uploaded anywhere?
No. The watermark is stamped entirely inside your browser with pdf-lib. Your document never leaves your device — you can verify this in your browser's network panel.
Diagonal or tiled — which should I use?
One diagonal stamp is the classic look for drafts and confidential documents: clearly visible, easy to read around. Tiled repeats the text across the whole page, which makes it much harder to crop or cover up — better when a leak would actually hurt.
Can I watermark with my company name?
Yes — type any text up to 40 characters. A name or email address works well: if a copy circulates, it shows exactly who it was shared with.
Does the watermark change my document?
It adds text on top of each page; the original text, images and layout are untouched. The output is a new file — your original is never modified.
What does the free version include?
One PDF up to 50 MB or 200 pages, with diagonal and tiled layouts, opacity, size and colour controls. PDF Watermark Pro ($29 one-time) removes the limits, adds image watermarks and batch processing, and removes ads.