How do I add a watermark to my PDF?

Drop in your PDF, type the watermark text (such as CONFIDENTIAL, DRAFT or your company name), set the size, opacity and angle, then press Apply. The text is stamped across every page and you download the new PDF. Everything runs in your browser, so the file is never uploaded.

Can I control how the watermark looks?

Yes. You set the font size, the opacity (how see-through it is) and the angle. A 45 degree diagonal is the default and the most common, but you can also place it horizontal or vertical. The watermark is centred on each page.

Does it watermark every page?

Yes, the same watermark is applied to all pages of the PDF in one go. Each page keeps its original size and content; the watermark sits on top.

Yes. The watermark is added entirely on your device in the browser. Your PDF is never sent to a server, so confidential documents stay confidential.

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What the PDF watermark tool does

This tool stamps a text watermark across every page of a PDF. Type the text you want, such as CONFIDENTIAL, DRAFT, a copyright line or your company name, choose how big, how faint and at what angle it sits, and download the watermarked PDF. It is handy for marking drafts, protecting documents you share, or branding handouts.

The whole thing runs in your browser. Your PDF is never uploaded, which matters for anything confidential.

How to use it

Drop your PDF onto the box, or click to choose a file.
Type the watermark text.
Set the font size, the opacity and the angle (45° diagonal is the usual choice).
Press Process and download the watermarked PDF.

The watermark is centred and applied to every page in one pass.

Why use it here

It is free, instant and private, with no sign-up and no upload. You control size, opacity and angle, and the watermark goes on every page at once. Because it runs on your device, even sensitive documents stay private.

Tip: to merge, split, compress or convert PDFs, use the other PDF tools here. To watermark hundreds of files at once, the BulkPro desktop app from the same team handles bulk jobs.

Frequently asked questions

How do I add a watermark to my PDF?: Drop in your PDF, type the watermark text (such as CONFIDENTIAL, DRAFT or your company name), set the size, opacity and angle, then press Apply. The text is stamped across every page and you download the new PDF. Everything runs in your browser, so the file is never uploaded.
Can I control how the watermark looks?: Yes. You set the font size, the opacity (how see-through it is) and the angle. A 45 degree diagonal is the default and the most common, but you can also place it horizontal or vertical. The watermark is centred on each page.
Does it watermark every page?: Yes, the same watermark is applied to all pages of the PDF in one go. Each page keeps its original size and content; the watermark sits on top.
Is my PDF private?: Yes. The watermark is added entirely on your device in the browser. Your PDF is never sent to a server, so confidential documents stay confidential.

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Last updated: June 24, 2026