Watermark PDF
Add a centered diagonal text watermark to every PDF page.
✓ No signup✓ Mobile friendly✓ Clear limitations✓ Browser-first where practical
Recent tools are remembered only on this device.
Add watermark. Your original file is not changed.
Why use this watermark pdf?
Watermark PDF places a diagonal text watermark across every page.
Example
Mark a review copy as CONFIDENTIAL before sharing it.
Important note
Review readability before distributing the watermarked copy.
How to use it
Start with the inputs shown above, review any options or assumptions, then generate the result. Where the tool creates a file, keep the original until you have opened and checked the downloaded output.
Frequently asked questions
Is this tool free?
Yes. The core tool is free to use.
Do I need an account?
No. You can use it without signing up.
Does it work on mobile?
Yes. Toolbox is designed for modern mobile and desktop browsers.