How to use
- Choose a PDF file.
- Enter watermark text, adjust size and opacity.
- Click add and download.
FAQ
Can I add image watermarks?
Currently only text watermarks are supported. Image watermark is in development.
Does the watermark affect PDF content?
No, the watermark is overlaid on top of existing content.
About this Add Watermark to PDF
This tool uses pdf-lib drawText to add a semi-transparent diagonal text watermark to each PDF page. The watermark is gray, rotated 45 degrees, with adjustable size and opacity.