PDF Watermark Tool

Popular

Stamp custom diagonal text watermarks (e.g. "CONFIDENTIAL", "DRAFT", "COPY") with adjustable opacity across all PDF pages.

100% In-Browser Privacy
Zero Server Uploads
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Select a PDF document

Processed 100% locally in your browser with zero remote file transfers.

Choose PDF File
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Key Capabilities & Features

Custom watermark text input
Adjustable 10% to 90% opacity slider
Rotated 45-degree diagonal positioning
Zero server uploads

How to Use PDF Watermark Tool

  1. 1
    Upload PDFSelect your PDF document.
  2. 2
    Customize WatermarkEnter custom text and adjust opacity level.
  3. 3
    Download Watermarked PDFSave your stamped document.

Frequently Asked Questions

Can the watermark be removed by other users?

The watermark is permanently embedded as a vector text layer across document pages.