Add Watermark to PDF

Drop your PDF hereor tap to choose

Watermark text

Sizept

See-through%

Angle°

Colour

The first page appears here with your watermark.

Your files never leave your device. Everything happens inside your browser, even offline after the page loads.

What is the Add Watermark to PDF?

Add Watermark to PDF by Assignment Lab is a free online tool. Stamp a text watermark like "Confidential" or your name on every page of a PDF. Choose size, angle, colour and see a live preview.

At a glance

Price: Free. No sign-up, no watermark.
Works on: Phone, tablet and computer, in any modern browser.
Privacy: Runs in your browser. Your text and files are not uploaded.
Made by: Assignment Lab, free tools for students in India.

How to use the add watermark to pdf

Drop your PDF. The first page appears on the right.
Type the watermark, then set its size, angle, colour and how see-through it is. The preview updates live.
Choose "Once, in the middle" or "All over the page", then press the red button to download.

Frequently asked questions

Can I write the watermark in Hindi?

Yes. The watermark is drawn as a picture, so Hindi, Marathi and any other language work.

Does it change my text?

No. Your original pages stay exactly the same; the watermark is laid on top.

Is it free?

Yes. The Add Watermark to PDF on Assignment Lab is completely free with no sign-up, and it works right in your browser. Nothing you type or add is uploaded.