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Tool to manipulate SX files (S-records) such as s19 s28 and s37 files

Project description


SxTool is a very simple tool to work with dump files in ascii format, like S19, S28 and S37 formats. You can find specifications of those format at the following address:

The tool let you perform advanced operation on the file, while maintaining checksum, address and data consistency:

  • add lines, delete lines, split lines, merge lines
  • adjust address, change data, verify or recalculate checksum
  • flip the data bits, or XOR the data content

It is released under GPL license.

It was developed internally in a now defunct company. I am making it available to the public after a bit of clean-up and upgrade.

SxTool was initially developed by Anthony Portier, Nicolas Chesné, Philippe Fremy and Gaël Pouger.

Bug reports, improvement requests or praise should be managed on the GitHub repository or by email to phil.fremy at .

Release History:

2018-12-09: Version 1.1

  • first release as Open Source software


On Windows, the simplest is to download the zip files from the release page. It contains all the binaries needed to use SxTool.

For other OS and alternatively for Windows, SxTool is distributed in pypi and may be installed simply with:

pip install sxtool


Screenshot1 Screenshot2 Screenshot3

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