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Watermark PDF

Stamp a text watermark like CONFIDENTIAL or DRAFT across every page of a PDF, with custom size, colour, opacity and angle.

🔒 Your PDFs never leave your device

How to use the watermark PDF

  1. Drop your file onto the box or click Choose file.
  2. Set the options.
  3. Click the button — your new PDF downloads immediately.

About this tool

The watermark is added as real PDF text in the centre of each page, semi-transparent so content stays readable. Use it to mark drafts, protect previews or label confidential copies.

FAQ

Are my PDFs uploaded?

No. PDFPocket edits PDFs with the open-source pdf-lib and PDF.js libraries running inside your browser. Files never leave your device — ideal for contracts, bank statements and IDs.

Is there a file size or page limit?

No fixed limit. Very large files (hundreds of MB) depend on your device’s memory, but typical documents process in a second or two.

Does it work with password-protected PDFs?

Files that only restrict editing usually work. Files that need a password to open must be unlocked first.

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