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Free Watermark PDF

Stamp a text watermark across every page of a PDF — diagonal, horizontal, or tiled, with adjustable opacity and colour. Runs entirely in your browser.

Drop a file here, or click to browse

PDF · processed on your device

or press Ctrl+V to paste from your clipboard

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Your files never leave your device. All processing happens locally in your browser.

Stamp a text watermark (CONFIDENTIAL, DRAFT, your name…) across every page of a PDF. Runs entirely in your browser; the PDF is never uploaded.

Common uses

  • Add a CONFIDENTIAL WatermarkMark a document confidential across every page.
  • Add a DRAFT WatermarkClearly mark a document as a draft before sharing for review.
  • Watermark with Your Name or BrandStamp your name or company across a PDF you're sharing.
  • Mark a Document as a SAMPLEWatermark preview or sample PDFs you distribute publicly.
  • Mark Documents INTERNAL ONLYFlag internal documents so they aren't shared externally.

How It Works

Stamping a watermark (CONFIDENTIAL, DRAFT, a name) across a PDF usually means Acrobat or an upload. This draws it on with pdf-lib, in your browser.

  1. 1
    You drop in a PDF
    The page count is read locally with pdf-lib — nothing is uploaded.
  2. 2
    You set the watermark
    Type the text and choose a layout (diagonal, horizontal, or tiled across the page), colour, opacity, and size.
  3. 3
    It's drawn on every page
    pdf-lib draws the semi-transparent, rotated text on each page over the existing content.
  4. 4
    You download the result
    The watermarked PDF is offered for download with the original content intact beneath the watermark.

Mark a document as confidential or draft without sending it to a server — everything is stamped on your device.

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Frequently Asked Questions