I had a great experience using Kaitai in a previous job. We were decoding proprietary binary messages from Teltonika OBD GPS trackers. The online editor, https:

I had a great experience using Kaitai in a previous job. We were decoding proprietary binary messages from Teltonika OBD GPS trackers. The online editor, https://ide.kaitai.io/ https://ide.kaitai.io/, is really nice for developing and testing your definition. You can store multiple binary files in local-storage and you get a nice detailed look at the data and how your definition is parsing it.