Scrolling through one file automatically scrolls the second file, keeping the compared addresses perfectly aligned.

Fairdell HexCmp is a specialized tool used by automotive technicians for comparing binary files to identify differences in ECU software, tuning maps, and immobilizer data. The application features a side-by-side view with byte-level highlighting, allowing users to modify hexadecimal values directly, often within discussions on platforms like MHH AUTO to troubleshoot ECU clones or firmware issues. Share public link

Use this guide to read, annotate, test, and decide rapidly from “Fairdell HexCmp full - MHH AUTO - Page 1.”

Once verified, the modified file is written back to the vehicle. Cybersecurity and Software Integrity Notice

Locating specific data signatures while protecting evidence integrity. Hardware Engineers: Comparing firmware files or ROM images for inconsistencies. Support Engineers:

is a professional hexadecimal comparison tool developed by Fairdell Software. It is designed to compare two binary files and highlight the differences between them.

However, if you are specifically following an MHH AUTO tutorial that references "Fairdell HexCmp full" by name, using a different tool can be frustrating because menu names and keyboard shortcuts differ.