Add a Watermark to a PDF Online

The PDF Watermark tool stamps a text label or image across every page of a document. Use it to mark drafts as confidential, brand client deliverables, or discourage redistribution of leaked copies.

Text vs image watermarks

Text watermark — fast to apply, fully customisable colour and size. Best for words like DRAFT, CONFIDENTIAL, or For internal use.
Image watermark — drops a logo or signature graphic. PNG with transparency is recommended.

Tips

For a subtle background mark, set opacity around 15–25%.
A 45° rotation produces the classic diagonal watermark effect.
Stamping happens in the browser; the source PDF never leaves your device.