Watermark PDF
Stamp a text watermark — CONFIDENTIAL, DRAFT, your company name — on one or more PDFs at once.
100% local processing — your files won't be sent to any server.
The watermark is text drawn over the pages: it identifies the document, but an advanced PDF editor can remove it.
Files processed in this tab aren't stored or shared with anyone — not even NativePDF.
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Frequently asked questions
Is my file uploaded to a server?
No. The watermark is drawn in your browser, in a separate process (Web Worker).
How do I add the watermark?
Type the text, pick size, color, angle, opacity, and whether you want one in the center or tiled. The preview shows roughly how it'll look; then just choose your files.
Can the watermark be removed later?
It's drawn over the pages, like in other tools of this kind. An advanced PDF editor can remove it; it's meant to identify the document, not as strong protection.
Can I watermark several PDFs at once?
Yes, up to 50 files at a time with the same watermark.
Do I need an account, an install, or to pay?
No. It's free, with no sign-up and nothing to install.