Add a watermark to multiple PDF files at once

Add the same diagonal watermark text to multiple PDF files at once, for example "Draft" or "Confidential". Download all files together in a ZIP. Free, local in your browser.

Drop one or more PDFs here

Drop here or click to choose

Files stay on your device — nothing is uploaded

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Your file is processed in your browser and never uploaded.

How does it work?

1
Choose your PDFs
Drag multiple PDFs here.
2
Type the watermark text
For example Draft, Confidential or Copy.
3
Watermark & download
Download all watermarked files in one ZIP.

Frequently asked questions

Can I customise the color or position?

No, this tool uses a fixed diagonal gray style across the center of each page. For more options, use the single-file watermark tool.

Are my files uploaded?

No. Everything happens in your own browser. Your file never leaves your device and is not stored anywhere.

Is it free?

Yes, completely free and without watermark, ads or account.