About Watermark
Watermark stamps a line of text — such as CONFIDENTIAL, DRAFT or COPY — at an angle across every page, so readers can see a document's status at a glance.
How to use Watermark
- Add your PDF.
- Type the watermark text.
- Set the opacity between 5 and 100 — around 20–30 is visible without hiding the content.
- Press Watermark and download.
Tips for better results
- Keep the text short so it fits across the page.
- Add the recipient's name (e.g. 'Copy for J Smith') to discourage onward sharing.
- Add the watermark before protecting the file with a password.
Limitations
This tool adds watermarks; it does not remove existing ones. A watermark is a visible deterrent, not a security control.
Frequently asked questions
Can I remove a watermark with this tool?
No. It only adds text watermarks.
Can I use an image or logo?
Not at the moment — text only.
Are my files uploaded?
Your file is processed by your own browser. It is not uploaded to our servers, and closing the tab clears it from memory.
Guide last reviewed 28 October 2026 by the ModernExpert.AI team.