Tool comparison
HxD is a free hex and disk editor for Windows developed by Maël Hörz (mh-nexus). It opens files of virtually any size, plus raw disks and system RAM, and presents byte-level views with fast search, replace, export, and file comparison. In ECU tuning it is a staple for inspecting raw firmware reads, locating map or code regions by byte pattern, comparing an original dump against a modified one to confirm exactly which bytes changed, and applying manual patches. Built-in checksum and hash calculators, a data inspector, and fill/insert operations help verify edits and understand binary layout. Tuners reach for it alongside dedicated map editors whenever a change must be checked or performed by hand. It is lightweight, portable, and widely trusted in the community.
Ghidra is a free, open-source software reverse-engineering framework released by the U.S. National Security Agency. It provides a disassembler, an interactive decompiler that recovers C-like pseudocode, cross-references, scripting in Java and Python, and collaborative project support. It supports a broad set of processor architectures, including ones found in automotive ECUs such as PowerPC, and can be extended with SLEIGH processor definitions for others like Infineon TriCore. In ECU research it is used to disassemble and decompile firmware, understand control logic, locate map-access routines, checksum algorithms, and diagnostic/DTC handling, and to document memory layout. It is a heavyweight, expert-level tool for people building tuning solutions and understanding how an ECU actually computes, not an end-user remapping application.
HxD (Hex Editor / Reverse Engineering, mh-nexus (Maël Hörz)) and Ghidra (Hex Editor / Reverse Engineering, NSA (open source)) compete in the same space, so the choice comes down to coverage, workflow and price for your specific ECUs. Free Windows hex and disk editor used to inspect and patch ECU firmware dumps Free NSA reverse-engineering suite with decompiler for ECU firmware
Whichever you flash with, Softechpro Solutions auto-applies DPF/EGR/AdBlue/DTC-off modules and Stage patterns with automatic checksum correction across ~1,400 firmwares on Windows & macOS — the fast way to get the actual file edits done.
See SoftechproMore on HxD