How to Convert Multiple FBX Files to JXL?
1. Download and Install reaConverter
reaConverter is a standalone Windows app — download, install, and start converting FBX files in under two minutes.
2. Load your FBX files
Launch reaConverter and drop in your FBX files. The software queues everything for batch processing with consistent settings.
Add files by dragging them in, browsing folders, or using the right-click menu from Windows Explorer.

3. Select JXL as output format
Pick JXL as output format and choose the destination folder where you want to save new .jxl files.

4. Start FBX to JXL conversion
Then simply press the Convert button and your conversion will begin in no time!

Once the conversion is complete, you can find your JXL files in the destination folder you selected.
FBX to JXL: what carries over and what does not
FBX describes geometry rather than pixels, so it has no inherent resolution. The conversion renders it at whatever size you choose, and that choice is final: enlarging the JXL afterwards will not recover the sharpness. Set the output dimensions or DPI before converting, not after.







