ECU Editor / Map Editor
TunerPro is a free, widely used Windows ROM-editing application by Mark Mansur that edits ECU calibrations using external definition files (XDF) describing the tables, scalars, and flags in a given firmware. Because it is definition-driven, TunerPro can work with almost any ECU for which a community or user-made XDF exists; it is especially popular for older GM OBD-I/OBD-II and is used across many makes by hobbyists and reverse engineers. It displays and edits 2D/3D tables with graphing, supports checksum plug-ins for some platforms, and lets users build their own definitions. TunerPro itself does not read or write the ECU; users pair it with a compatible flashing or emulation device. It is a cornerstone tool of the DIY and reverse-engineering tuning community.
TunerPro is a manual, definition-driven editor requiring external hardware and XDF files; Softechpro instead auto-applies pre-built diesel emissions/DTC-off modules and corrects checksums across ~1,400 EU firmwares. They suit different skill levels and platforms.
See Softechpro plansTry the file service