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Free PDF Watermark Tool

Stamp a text watermark like "DRAFT" or "CONFIDENTIAL" across every page of a PDF — free, and everything happens in your browser.

Drop a PDF here to upload

PDF files up to 50MB — processed entirely in your browser

Frequently asked questions

Yes, completely free with no account or sign-up required, and no limit on how many times you can use it.

No. The watermark is added entirely in your browser — your file is never sent anywhere.

It's stamped diagonally across the center of every page, semi-transparent, so the original content stays readable underneath.

Files up to 50MB are supported.

Yes — the watermark is applied consistently across every page of the document.

This page just stamps a watermark onto a PDF. SignFastAi's core product lets you upload a document, place signature fields on it, and send a secure signing link to get it signed.

Need this watermarked PDF signed too?

SignFastAi lets you upload a document, mark where to sign, and send a secure link — no enterprise contract or sales call required.

Get started free