free · no account · no watermark
Confidential stamp
Stamp text or a logo across every page, at the opacity and angle you set. Runs in your browser — the document stays on your device.
Darkens the page instead of painting over it, so the words stay readable.
No file at hand? Open Watermark PDF anyway →
Your browser would not let the file travel between pages (private mode does this) — open Watermark PDF and drop it there instead.
Three steps · no account
How the room works
Watch it run — or tap a step to see where it happens.
Three questions
Questions
Is Watermark PDF free?
Yes — free, with no watermark, no account and no daily cap. It runs entirely in your browser, so there is nothing to meter.
Does my file get uploaded?
No. Everything happens in this browser tab — the file never leaves your device. You can keep the Network tab open while it runs: no request carries your file.
Do I need an account?
No. This tool is exactly the same signed in or out.
Open Watermark PDF
Free, no account — and your file never leaves your device.