PDF.UK tool

Watermark PDF

Add a text watermark with adjustable opacity, size and rotation.

Choose file
Select one PDF file. Drag and drop is also supported.

Watermark text

Font size

Opacity (%)

Rotation

How to use Watermark PDF

Select a PDF and enter the watermark text and display settings.

Privacy

This tool is designed for client-side processing. The selected file is processed by JavaScript in your browser rather than intentionally uploaded to a PDF.UK application server.

Limitations

Very large, encrypted, damaged or unusually complex PDFs may fail because browser memory and PDF structure vary. Keep an original copy of important documents.

FAQ

Is this tool free?

Yes. PDF.UK provides these tools for free use.

Do I need to install software?

No. You need a modern browser with JavaScript enabled.

Will my PDF be stored?

The tool itself is designed to process the file locally in your browser and does not intentionally upload it to a PDF.UK backend.