PDFConverterBox

Add Watermark

Stamp a custom text watermark diagonally across every page of your PDF.

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Click to select a PDF file or drag & drop

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How it works

  1. 1

    Upload the PDF you want to watermark.

  2. 2

    Type your watermark text and adjust the opacity.

  3. 3

    Click "Add watermark" to download the stamped PDF.

Frequently asked questions

Can I change the watermark color?

The current version uses a fixed red tone for visibility; custom colors are on our roadmap.

Does the watermark appear on every page?

Yes, it's applied diagonally across every page of the document.

Is this reversible?

No — the watermark is baked into the PDF content, so keep your original file if you need an unwatermarked copy.