Add Watermark to PDF Online — Custom Text Watermark
Add a customizable text watermark to PDF pages online with font size, angle, opacity and color controls.
Accepted formats: PDF
Files are sent only to your self-hosted PDF processor and removed from temporary application storage after processing.
About this tool
The self-hosted processor applies repeated text watermarks using Roman or Chinese character support according to the page locale.
How to use
- Choose the PDF and enter watermark text.
- Set size, angle, opacity and color.
- Process and inspect every page.
Features
- Supports 0, 45 and -45 degree choices.
- Adjustable size, opacity and color.
- Self-hosted processing.
Common use cases
- Mark drafts or confidential copies.
- Label review documents.
- Add distribution text.
Common issues and tips
- Long text may overlap document content.
- Watermarks do not prevent copying or editing.
Privacy
The PDF and watermark text are sent to the self-hosted processor and are not kept permanently.
Frequently asked questions
Which angles are available?
0, 45 and -45 degrees in the interface.
Can opacity be changed?
Yes, from 0.05 to 1.
Is every page marked?
The operation is intended to watermark PDF pages; verify the result.