Watermark a PDF in your browser
Marking a document as CONFIDENTIAL, DRAFT, or with your name keeps it from being passed off as something official. This free tool stamps a text watermark across every page of your PDF — pick the text, colour, size and opacity, and whether it sits as a single diagonal line or repeats across the whole page. It all happens in your browser, so your document is never uploaded.
Who uses this tool
People sharing a draft or sample that shouldn't be reused, professionals marking documents confidential, and anyone protecting a scanned ID by stamping the purpose across it.
How to add a watermark
- Choose your PDF.
- Type the watermark text and set the colour, size, opacity and style.
- Click Add watermark and download — it's applied to every page.
Frequently asked questions
How do I add a watermark to a PDF?
Type the text, set the colour, size and opacity, choose diagonal or tiled, and click Add watermark — it's stamped on every page.
Can I make it faint or repeated?
Yes — lower the opacity for faint, and choose Tiled to repeat it across the page.
Is my PDF uploaded?
No — the watermark is added in your browser and never sent to a server.