Add Watermark to PDF
Mark a PDF as confidential, draft or your own with a text watermark on every page. Adjust the opacity and angle, then download — all in your browser.
Last updated: July 2026
This tool stamps a text watermark — like “CONFIDENTIAL” or “DRAFT” — across every page of a PDF, with adjustable opacity, font size and a diagonal or horizontal angle. The watermark is drawn into the file with pdf-lib entirely in your browser, so your document is never uploaded to a server.
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How to use Add Watermark to PDF
- Choose a PDF file.
- Type your watermark text and adjust opacity, size and angle.
- Click “Add watermark & download”.
Frequently asked questions
Does it watermark every page?
Yes — the text is applied to all pages of the document.
Is my PDF uploaded?
No — watermarking happens locally in your browser.
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