Watermark PDF
Add diagonal text watermark to all pages. Color, opacity, size and angle customizable.
- 100% local · no upload
Frequently asked questions
Is the watermark removable?
Visual watermarks become part of the page content — they can be edited out by anyone with PDF editing tools. For strong protection use password + permission restrictions.
Does it work with accents?
Yes, but pdf-lib uses Helvetica WinAnsi by default — extra-Latin chars may render as ?. For full UTF-8, embedFont with custom TTF (future version).
Apply only to specific pages?
This version applies to all pages. For specific pages: split first, watermark, then merge back.
Text vs image watermark?
This tool is text only. For image/logo watermarks, use a dedicated tool (or convert image to text with text-on-path effect).
Does it preserve PDF metadata?
Yes — only the visual content of each page is modified. Title, author, table of contents stay intact.