How to Convert Multiple ISM Files to IGS?
1. Download and Install reaConverter
First, grab reaConverter from the download button below. Installation is fast, and the software runs offline — no account or signup needed.
2. Load your ISM files
Launch reaConverter and load the ISM files you want to convert. Add a few files or thousands, batch processing handles them all.
Drag-and-drop ISMs directly into reaConverter or use the folder browser to load entire directories.

3. Select IGS as output format
Set IGS as output format and select where to save your converted files. Customize quality settings if needed.

4. Start ISM to IGS conversion
Press Convert to begin processing. You can watch the progress or minimize and let it run in the background.

Your converted IGS files will appear in the destination folder as soon as processing completes.






