How to PDF Watermark Online
Last updated October 13, 2026
Add a diagonal text watermark to selected PDF pages.
How to use this tool
- Select the supported file or enter content.
- Choose pages and settings when available.
- Process and review the complete result.
- Download or print the verified document.
Compatibility and privacy
Processing happens locally in the browser. Keep the original file because advanced Word formatting, encrypted PDFs and complex layouts may not convert perfectly.
Ready to try it?
Open PDF Watermark โAdd a diagonal text watermark to selected PDF pages.