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Add a text watermark to a PDF

Stamp a diagonal text watermark — for example DRAFT, CONFIDENTIAL or your name — across every page of a PDF, with control over size and opacity.

Drop a PDF here

One PDF · up to 100 MB

PDFs are read and written in your browser with the open-source pdf-lib library. Files are not uploaded to ToolsNest servers and are released from memory when you clear the tool or leave the page.

How to use the PDF Watermark

  1. 1Choose a PDF file.
  2. 2Type the watermark text.
  3. 3Adjust size and opacity.
  4. 4Download the watermarked PDF.

Supported formats and limits

  • One PDF up to 100 MB.
  • The watermark is centred and rotated 45° on every page.
  • Opacity from 5% to 100%; lower values keep the content readable.
  • Encrypted or password-protected PDFs are not supported.

Common uses

  • Marking a document as a draft before circulation.
  • Labelling confidential reports.
  • Adding a company name to sample documents.

Frequently asked questions

Can the watermark be removed later?

A watermark is not security. Anyone with PDF editing software can remove it. Do not rely on it to protect sensitive content.

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