Add Watermark

Free

Add a text watermark to every page of your PDF file. Runs 100% in your browser.

Drop a PDF file here or click to browse

or click to browse · max 50MB

billu's ready when you are

How to add a watermark to your PDF?

billu.fun's PDF Watermark tool uses pdf-lib to overlay custom text onto every page of your document directly in your browser. Since no files are uploaded to our servers, your data remains completely secure and private.

Simply select or drag-and-drop a PDF, enter the desired watermark text (like "CONFIDENTIAL" or "DRAFT"), and optionally adjust the opacity. Click "Add Watermark" and your updated PDF will be ready for download instantly.

The watermark is applied diagonally across the center of each page with a standard size and color, ensuring it remains visible without obscuring the underlying content entirely.