Watermark PDF — Free Online PDF Tool

Stamp text like CONFIDENTIAL or DRAFT across every page of a PDF. Free, instant, no sign-up — files auto-deleted afterwards.

How to watermark pdf

1. Open the Watermark PDF tool and add your file — drag & drop or click to browse.
2. Your watermark text is stamped across every page.
3. Download your result instantly — nothing is stored.

Frequently asked questions

Can I watermark every page at once?

Yes — the text you enter is applied to all pages in a single step.

Is it free?

Yes — every Genius tool is completely free, with no account, no watermark and no daily limits.

Are my files safe?

Files are sent over a secure HTTPS connection, processed, and automatically deleted right afterwards. Nothing is stored or shared.

Do I need to install anything?

No — it runs in your browser with no sign-up or software, and works on both phone and desktop.

Part of Genius Tools — a free suite of PDF, image and AI document tools.