Free PDF Watermark is 100% Work Free PDF Watermark Creator software that can add watermark (text-based, image-based, and other PDF watermarks) to PDF documents for free. It provides the simplest solution for adding PDF watermark. You can quickly add text watermark or image watermark to multiple PDF files in a few seconds. You can add a watermark to PDF in 3 simple steps. Free PDF Watermark comes with three watermark templates, you can adjust the font/image size, color value, opacity, inversion, and you can also select the page range to add Watermark.