What opacity should I use?

Around 20–30% is the sweet spot: clearly visible as a watermark without making the text underneath hard to read. Go higher only when you want to actively discourage using the document.

Is the Watermark PDF tool free?

Yes — it's free with no sign-up, no watermark added to your file, and no daily limit. Files are processed on demand and never stored on our servers.

Watermark PDF

Stamp text across every page of a PDF. Mark a document as a draft, label it confidential, or brand it with your company name.

Drop your PDF hereor click to browse — up to 50MB

Your file is processed on our server and deleted the moment your download is ready — never stored, and cleared within the hour at the very latest.

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Why use this tool

Applies to every page in one pass
Control size, colour, opacity and tilt
Optional tiled mode covers the whole page, making removal much harder
Files are processed on demand and never stored

How it works

1Upload your PDF.
2Type your watermark text and adjust the styling.
3Press Add watermark.
4Download the watermarked PDF.

Watermark PDF — frequently asked questions

It's drawn into the page content, so it can't be toggled off in a viewer. A determined person with the right software could still edit it out — tiled mode across the whole page makes that considerably more work.

More edit tools

Rotate Delete Pages Extract Pages Rearrange Page Numbers Sign

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