How to Convert Multiple TN3 Files to IGS?
1. Download and Install reaConverter
reaConverter installs quickly on any Windows PC. No dependencies, no bloatware — just a clean setup that's ready to use immediately.
2. Load your TN3 files
Open reaConverter and import your .tn3 files. No file limits, no slowdowns. Add as many as you need.
Drag files into the window, use the Add Files button, or select entire folders.

3. Select IGS as output format
Select IGS as target format and pick where to save results. You can keep default settings or fine-tune the output.

4. Start TN3 to IGS conversion
Hit Convert to process your files. The log window shows progress, timing, and status for every file.

Conversion complete? Your IGS files are saved to the destination folder, ready to use.






