Converting XMP to DNG for free is a process of embedding editing data (XMP) into an image file (DNG). Because an XMP file is a small text-based instruction set and a DNG is a full image file, you cannot "convert" one into the other directly; instead, you must apply the XMP settings to an image and save that image as a DNG. The Lightroom Queen Top Free Tools and Methods Adobe Digital Negative (DNG) Converter