A lightweight CLI tool for comparing firmware / binary files.
Z:\> python main.py bin qa_samples\binary\same_a.bin qa_samples\binary\one_diff.bin
Binary diff result
File 1: qa_samples\binary\same_a.bin (4 bytes)
File 2: qa_samples\binary\one_diff.bin (4 bytes)
Total differences: 1
offset 0x00000001 : 0x02 -> 0x09
Changed regions:
0x00000001 - 0x00000001 (1 bytes)
This tool helps you quickly inspect differences between binary / firmware files.
Features:
- Byte-level diff
- Basic region grouping
- Human-readable output
- Text and directory comparison modes
It is designed for quick inspection, debugging, and understanding binary changes.
Binary diff result
File 1: a.bin (5 bytes)
File 2: b.bin (6 bytes)
Total differences: 3
offset 0x00000001 : 0x02 -> 0xFF
offset 0x00000003 : 0x04 -> 0x99
offset 0x00000005 : <none> -> 0x06
File sizes differ: a.bin=5 bytes, b.bin=6 bytes
Changed regions:
0x00000001 - 0x00000001 (1 bytes)
0x00000003 - 0x00000003 (1 bytes)
0x00000005 - 0x00000005 (1 bytes)
Requires Python 3.x
git clone <your-repo-url>
cd fw_diff_tool
python main.py -h
Compare two binary files:
python main.py bin old.bin new.bin
Show changed regions only:
python main.py bin old.bin new.bin --regions-only
Limit displayed differences:
python main.py bin old.bin new.bin --max-diffs 10
Text comparison:
python main.py text file1.txt file2.txt
Directory comparison:
python main.py dir dirA dirB
This free version is designed for basic inspection and debugging.
It does not include:
- Region summary statistics
- JSON output
- Filtering options (ignore patterns, region size)
- Workflow / CI integration
The Pro version adds advanced analysis and automation capabilities:
- Region summary (total bytes, region count, largest region)
- JSON output for scripting and CI pipelines
- Filtering options (ignore patterns, region size)
- Workflow integration (fail conditions, quiet mode)
Designed for engineers who need to integrate binary comparison into real workflows.
π Get the Pro version: https://mtlabs.gumroad.com/l/firmware-region-diff
- This tool focuses on clarity and practical usage.
- Output is designed to be readable and script-friendly.
- No GUI β CLI only.
This project is licensed under the MIT License.
Questions or feedback are welcome.
Email: mtlabs.dev@outlook.com
Please note that responses may sometimes be delayed.