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.
The current version supports text watermarks only — image or logo watermark support is planned for a future update.
The tool attempts to load PDFs with ignoreEncryption enabled, but some encrypted PDFs may not load correctly depending on the encryption type used.
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.
Yes, the current version applies the same watermark text and styling to every page of the PDF.
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.
Marking documents as 'DRAFT', 'CONFIDENTIAL', or 'SAMPLE', or adding a copyright notice across pages before sharing a document publicly.
Not directly — the watermark becomes part of the page content. To remove it, you'd need to start from the original (unwatermarked) PDF again.
