Add your custom text watermark to stamp your PDF files.
No. This tool uses pdf-lib to draw text directly onto each page using PDF's native graphics layer. The output is fully compliant with the PDF standard and can be opened in any PDF reader without special software.
The watermark is burned into the PDF content layer and cannot be removed with standard PDF editing tools. This makes it an effective method for marking confidential or draft documents.
Yes. The watermark is applied to every page of the document at the center, with your selected rotation, opacity, color, and font size.
Absolutely. All processing happens entirely inside your browser. Your PDF is never uploaded to any server — it never leaves your device.