How to Add a Watermark to a PDF Free Online

Marking a document as draft or confidential protects it from misuse. The tool stamps your text diagonally across every page of the PDF, with adjustable opacity and size.

Watermark a PDF in 4 steps

Open the free Watermark PDF tool and drop your PDF into the page.
Type your watermark text, like DRAFT or CONFIDENTIAL.
Adjust opacity, size, and angle with live preview.
Download the watermarked PDF.

Screenshot: a CONFIDENTIAL watermark stamped across a PDF page

Tips

30 to 40 percent opacity reads clearly without hiding content.
A diagonal watermark is harder to crop out than a corner one.

Watermark a PDF now

Frequently asked questions

Is adding a watermark free?

Yes. It is free with no account and no page limits.

Is my PDF uploaded anywhere?

No. Watermarking runs in your browser; the file never leaves your device.

Can I use my own logo?

Currently text watermarks only; image watermarks are on the roadmap.

Can the watermark be removed?

It becomes part of the page, so it cannot be removed with one click.

How to Add a Watermark to a PDF

Watermark a PDF in 4 steps

Tips

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Frequently asked questions