How to add a watermark to a PDF
A diagonal DRAFT or CONFIDENTIAL stamp tells everyone how to treat the document at a glance.
Updated July 5, 2026
Do it now with Watermark — free, no signup. Open →Why watermark a PDF
A watermark communicates status instantly: DRAFT keeps a work-in-progress from being mistaken for final, CONFIDENTIAL sets expectations before anyone reads a word, and a company name discourages unauthorized reuse. Because it sits across the whole page, it survives printing and screenshots.
How Pditor does it
Type your text and Pditor stamps it diagonally across every page. Adjust the opacity so it’s visible but doesn’t bury the content, tune the rotation and size, and apply. The mark is added as a layer over the existing pages, so the original content is untouched.
Private and free
Everything runs in your browser session and your file auto-deletes within an hour — no signup. Changed your mind, or received a marked file you own? Remove watermark deletes a text or logo watermark layer losslessly.
Frequently asked questions
- How do I add a watermark to a PDF?
- Open the Watermark tool, type your text (like DRAFT or CONFIDENTIAL), set the opacity and angle, and apply. It stamps every page. It's free and needs no signup.
- Can I make the watermark faint so the text stays readable?
- Yes. Lower the opacity so the watermark shows clearly without obscuring the content underneath.
- Will it appear on every page?
- Yes — the watermark is stamped on all pages so the whole document is marked consistently.
- Can the watermark be removed later?
- A stamped text watermark can often be removed losslessly with the Remove watermark tool, since it's a separate layer.