Add “UNOFFICIAL” Watermark

Apply a centered unofficial watermark to every page, with opacity ready to adjust before processing.

About this tool

Apply a centered unofficial watermark to every page, with opacity ready to adjust before processing.

How to use this tool

  1. Choose a PDF file from your device.
  2. Review or adjust the preset options shown.
  3. Run the tool and download the result when available.

How it works

This preset stamps the text “UNOFFICIAL” across every page of the selected PDF, centered on each page and starting at 0.28 opacity, and the watermarked file is generated locally in your browser.

When to use this tool

  • Apply a centered unofficial watermark to every page, with opacity ready to adjust before processing.

Limitations

When you run Add “UNOFFICIAL” Watermark, some encrypted or malformed PDFs may not be processable, and processing is limited by available browser memory.

Privacy

The PDF you select in Add “UNOFFICIAL” Watermark is processed locally in your browser and is not uploaded.