PDF Watermark
Free PDF watermark tool. Add text watermarks to your PDF documents. Customize position, opacity, font size, and rotation. Runs in your browser using pdf-lib.
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PDF files never leave your device
About the PDF Watermark
The PDF Watermark runs entirely in your browser. Your data never leaves your device — there's no upload to any server. This keeps your files and information completely private while delivering instant results.
Free PDF watermark tool. Add text watermarks to your PDF documents. Customize position, opacity, font size, and rotation. Runs in your browser using pdf-lib. It's free, requires no sign-up, and works on any device — desktop or mobile.