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Watermark PDF

Adds translucent diagonal text to every page of a new PDF copy.

Processed locally in your browser. Your file never leaves your device.
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How Watermark PDF works

Adds translucent diagonal text to every page of a new PDF copy.

Try an example

Mark every page of a review copy with DRAFT or CONFIDENTIAL.

Good to know

Local processing. Maximum 50 MB per input, 100 MB total, 20 files and 2,000 total pages. Encrypted or malformed PDFs are rejected. A watermark is visible decoration, not secure redaction, access control or a digital signature. Built-in font text supports basic Latin and Western European characters.

Your privacy

Processing happens on this device for this tool. We do not upload your input, put it in share links or save it to your favourites. Closing this tab discards the working input; downloaded results remain wherever you save them.

When this tool is useful

Use Watermark PDF when you need a quick, local result and want the rule or limitation visible alongside it.

How to use it

  1. Enter the input using the labels shown.
  2. Run the operation and review the result.
  3. Download or copy the result only after checking it.

Checks before you rely on the result

  • Local processing. Maximum 50 MB per input, 100 MB total, 20 files and 2,000 total pages. Encrypted or malformed PDFs are rejected. A watermark is visible decoration, not secure redaction, access control or a digital signature. Built-in font text supports basic Latin and Western European characters.
  • Keep the original input when the operation creates a new copy.
  • Use the related tools below when the next step needs a different format.

This page is maintained with the tool implementation and its deterministic tests. If the result looks wrong, report the issue with a non-sensitive example.

Read the Watermark PDF instructions

A useful next step

Compress PDF
Visual PDF Editor
PDF Form Filler
Made for clarity. Built to be useful.Report an issue