PDF

PDF watermark

Add a text watermark to every page of your PDF.

Drop a PDF here or click to browse

Add a text watermark to every page

100% private. All processing happens locally in your browser — no files or data are ever sent to a server.

How to use PDF watermark

01 Drag and drop your PDF file(s) onto the upload area, or click to browse
02 Configure any options (page range, output settings) as needed
03 Click the action button to process — your file downloads instantly

Frequently asked questions

Common questions about PDF watermark.

Is PDF watermark free to use?

Yes, PDF watermark is completely free. No account, subscription, or payment is ever required — just open the page and start using it.

Does PDF watermark upload my data to a server?

No. PDF watermark runs entirely in your web browser using client-side JavaScript. Your files, text, and data never leave your device, making it 100% private.

Can I use PDF watermark on my phone or tablet?

Yes. PDF watermark is fully responsive and works on all modern smartphones, tablets, and desktop browsers without installing any app.

Are my PDF files kept private?

Absolutely. PDF watermark processes your PDF entirely in your browser using pdf-lib, a client-side JavaScript library. Your files are never uploaded to any server.

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About PDF watermark

PDF Watermark adds a text watermark to every page of your PDF. Choose the text (e.g. CONFIDENTIAL, DRAFT), position, opacity, font size, and colour. Supports diagonal centre, centre, bottom left, and bottom right. All processing happens in your browser using pdf-lib — your file never leaves your device. Useful for marking drafts, confidential documents, and internal-only materials.