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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.