Add Watermark to PDF
Add a text watermark to every page of a PDF. Your files never leave your device.
Drag & drop a PDF, or click to choose
Load one PDF. It is processed on your device only and never leaves it.
How to add a watermark
Choose diagonal placement and opacity — great for CONFIDENTIAL or DRAFT stamps. Loading and watermarking both happen entirely in your browser, so you can handle confidential documents without ever uploading them.
Load one PDF, type the watermark text, choose opacity and angle, and press the button. Everything is processed on your device, so your file is never sent anywhere.
- Load a PDF: drop it on the box or click to choose.
- Set the text and look: watermark text (e.g.
CONFIDENTIAL), opacity, and whether to place it diagonally. - Add & download: a PDF with the watermark centered on every page is saved (named
originalname_watermark.pdf).
Handy for
- Marking documents as CONFIDENTIAL, DRAFT or COPY before sharing
- Making it obvious at a glance that a file is a draft or sample
- Stamping a watermark locally without uploading to an online service
The watermark is drawn in semi-transparent gray, centered on every page. The standard font can't render non-Latin scripts (use Latin letters/digits). It's embedded into the page content and is not a tamper-proof guarantee. Password-protected or corrupted PDFs may fail to load.