Xdf - Viewer
In the automotive performance world, an .xdf file is a "definition" or "map" file. It does not contain the actual program code for a car's computer (ECU); rather, it acts as a translator. It tells tuning software how to interpret a binary file (.bin) from the vehicle’s ECU.
Tuning software like TunerPro uses the XDF to display raw binary data as understandable tables and graphs (e.g., fuel maps or ignition timing). 2. Biosignal Research (Lab Streaming Layer) How to open XDF file (and what it is) - File.org xdf viewer