Add Watermark to PDF
Stamp a text watermark across every page of a PDF. Choose colour, opacity, size and position. Works entirely in your browser.
Drop a PDF
Nothing is uploaded — your file stays on your device.
What is the Add Watermark to PDF?
The Add Watermark to PDF tool stamps custom text — "CONFIDENTIAL", "DRAFT", your company name — across every page of a document. Control the text, position, font size, colour and opacity, and check the result in the live preview before downloading.
The watermark is added as a vector layer, so it stays sharp at any zoom or print size. Stamping runs locally in your browser.
How to use the Add Watermark to PDF
- 1Upload the PDF you want to watermark.
- 2Type the watermark text and pick a position (diagonal centre, corners, top or bottom).
- 3Adjust font size, colour and opacity — the live preview updates instantly.
- 4Use the page arrows to check the watermark on every page.
- 5Click "Add watermark & download" to save the stamped PDF.
Key features
- Custom text, position, font size, colour and opacity
- Live preview with per-page navigation
- Applies to every page automatically
- Vector watermark stays sharp when printed
- Fully client-side processing
Important notes
- The watermark is rendered as selectable text. To make it uncopyable, convert the PDF pages to images first.
- The current version applies the watermark to every page — split the PDF first if you only want some pages stamped.
Frequently asked questions
Can I add an image watermark?
The current version supports text watermarks only.
What fonts are supported?
The watermark uses Helvetica Bold, one of the standard PDF fonts available in every viewer.
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