Watermark PDF
Stamp a text watermark across every page. Everything runs in your browser — your file never leaves your device.
How to add a watermark to a PDF
- Choose a PDF file.
- Type your watermark text and pick a layout and opacity.
- Press Add watermark — the stamped PDF downloads automatically.
Is it private?
Yes. Everything runs inside your web browser, using your own device. Nothing is uploaded to any server, so your documents stay completely private.