PDF Watermark
Add a text watermark to every page of your PDF.
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How to Use PDF Watermark
- 1Upload your PDF file.
- 2Enter your watermark text, choose a font size, opacity, color, and position.
- 3Click 'Add Watermark' to apply it to every page.
- 4Download the watermarked PDF.
Frequently Asked Questions
Can I use a logo or image as a watermark?
Currently only text watermarks are supported. Image watermarks are planned for a future update.
Is the watermark permanent?
Yes — the text is drawn directly onto each page's content stream. It cannot be removed without specialised software.
What font is used?
The tool uses Helvetica Bold, one of the PDF standard fonts that doesn't require embedding, keeping file sizes small.
Can I apply the watermark to only some pages?
Currently the tool watermarks all pages. Per-page selection is planned for a future update.
About PDF Watermark
Adding a watermark to a PDF is the quickest way to mark a document as DRAFT, CONFIDENTIAL, or SAMPLE before sharing. Our PDF Watermark tool lets you customise the text, size, opacity, color, and angle, then applies it to every page instantly in your browser.
The watermark is drawn using pdf-lib's drawText function with the Helvetica Bold standard font. The diagonal 45° angle is the classic choice for confidentiality markings; horizontal placement works well for corner stamps or document labels. Opacity between 20–40% provides clear visibility without obscuring the underlying content.