PDF Watermark
PDF Watermark uses pdf-lib to draw a text overlay on every page of a PDF. Configure the watermark text, font size (12–72pt), opacity (10–100%), rotation angle, and color. A live preview shows how the watermark will look before you apply it and download the result.
PDF file
Watermark settings
Preview
Frequently asked questions
Can I add an image watermark?
No. Watermarks are text only; images and logos are not supported.
Does it work on password-protected PDFs?
The tool attempts to load PDFs with ignoreEncryption enabled, but some encrypted PDFs may not load correctly depending on the encryption type used.
Can I control where the watermark appears on the page?
The watermark is drawn across each page based on the rotation angle and font size you set, typically diagonally across the page — there isn't a separate position picker for placing it in a specific corner.
Will the watermark be applied to every page?
Yes, the current version applies the same watermark text and styling to every page of the PDF.
Can I make the watermark subtle/transparent?
Yes. The opacity slider ranges from 10% to 100%, so you can make the watermark very faint (e.g. 'DRAFT' in light gray) or fully opaque.
What's a common use for PDF watermarks?
Marking documents as 'DRAFT', 'CONFIDENTIAL', or 'SAMPLE', or adding a copyright notice across pages before sharing a document publicly.
Can I remove a watermark added by this tool?
Not directly — the watermark becomes part of the page content. To remove it, you'd need to start from the original (unwatermarked) PDF again.