# Do I need to install software to add a watermark to a PDF?

_Updated July 2026 · Arthize · https://arthize.com/answers/install-watermark-pdf_

No. You add a watermark to a PDF entirely in the browser — there is nothing to download or install. Adding a watermark stamps text or an image — like DRAFT or CONFIDENTIAL — across every page at the opacity and angle you choose.

## Answer

No. You add a watermark to a PDF entirely in the browser — there is nothing to download or install. Adding a watermark stamps text or an image — like DRAFT or CONFIDENTIAL — across every page at the opacity and angle you choose.

## More about watermark pdf

A watermark can be text or an image applied across every page.

Opacity and angle control how prominent the mark is.

Watermarks are useful for marking drafts and confidential copies.

## How to add a watermark to a PDF

1. **Open the watermark tool** — Sign in and open the Watermark tool.
2. **Add your PDF** — Upload the document to stamp.
3. **Design the watermark** — Set the text or image, opacity, angle and position.
4. **Download** — Get a watermarked PDF.

## FAQ

### How do I add a watermark to a PDF?

Adding a watermark stamps text or an image — like DRAFT or CONFIDENTIAL — across every page at the opacity and angle you choose. On Arthize it's free with no watermark and processed privately.

### Can I add a CONFIDENTIAL stamp to every page?

Adding a watermark stamps text or an image — like DRAFT or CONFIDENTIAL — across every page at the opacity and angle you choose. On Arthize it's free with no watermark and processed privately.

### Is adding a watermark free?

Adding a watermark stamps text or an image — like DRAFT or CONFIDENTIAL — across every page at the opacity and angle you choose. On Arthize it's free with no watermark and processed privately.