Precision Tools for ECU Calibration
A specialized hex editing application designed for ECU calibration and chiptuning work. Combines core hex editing capabilities with a comprehensive suite of CRC and checksum tools for verifying and correcting ECU file integrity.
Everything you need for ECU calibration work
Load original and modified BIN files side-by-side with synced scrolling to see exactly what changed.
Calculate and verify CRC32, MD5, SHA hashes to ensure file integrity before and after modifications.
Write corrected checksums directly into modified ECU files with one click.
Scan files to locate existing checksum patterns automatically.
Batch replace specific byte sequences across the file for efficient calibration work.
Build offset lists for map locations with the built-in Offset Builder tool.
Comprehensive checksum verification and correction
Real-time CRC calculation and monitoring as you make changes to the file.
Choose from CRC32, MD5, SHA-1, SHA-256 and more with the cmb_live_algo_mw selector.
Calculate MD5/SHA/CRC hash for any selected bytes in the file.
Apply calculated checksums directly into the ECU file at specified locations.
Additional utilities for calibration work
Pattern replacement tool for quick ECU calibration modifications.
Calculate address offsets and build location lists for map editing.
Convert between hex, decimal, binary, and ASCII formats instantly.
Includes all features from HexTool Basic: dual-pane editing, search, notes, diff highlighting.
Screenshots and video tutorials
How professionals use HexTool Chiptuner
Open original ECU file on the left pane, modified file on the right pane.
Use diff highlighting to see all changes between original and modified files.
Calculate checksum of selection to verify file integrity.
Make calibration changes using the hex editor and replace tools.
Use CRC Live Update or Write Checksum to correct the CRC.
Save the modified file ready for flashing to the ECU.
Get HexTool Chiptuner and streamline your chiptuning workflow.
Purchase for $179