PDF Text Watermark — Free, No Upload
Place a diagonal text watermark on every PDF page to identify a draft or review copy. It adds visible lettering over the page, without restricting document access or deleting underlying content.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
How to use this tool
Choose the text, size and opacity. This implementation replaces characters outside ASCII with question marks, so use an ASCII label such as DRAFT and do not expect a Korean phrase to render correctly.
Results and examples
Inspect the angle and how much text the watermark obscures in the output. It is applied to all pages and does not remove previous watermarks, so processing an already marked file can stack additional labels.
Worked example
Add DRAFT at 25% opacity and 48 points to mark every page as a draft. Try a smaller size such as 18 points for a long English phrase and check whether it extends beyond small pages.
Limitations
- The engine replaces non-ASCII characters with ?, so Korean watermark lettering is unsupported.
- A watermark neither removes source content nor prevents copying, and does not remove an existing watermark.
Fields
| Field | Guidance and constraints |
|---|---|
| Watermark text | Check the unit and format displayed beside this field. |
| Opacity | Accepted range: 8–80 · Input step: 1 |
| Type size | Accepted range: 18–96 · Input step: 2 |
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
What happens to Korean wording?
The current standard-font path can replace it with question marks.
Can I mark only selected pages?
This form draws the same wording on every page.
Related tools
You do not need to start over. Continue with the tool that fits your next step.
