How to Convert Multiple MOS Images to JXL?
1. Download and Install reaConverter
reaConverter is a standalone Windows app — download, install, and start converting MOS files in under two minutes. Need edits? Resize, rotate, or add watermarks during conversion.
2. Load your MOS files
Add your MOS files to reaConverter. Whether it's a handful or an entire archive, the batch engine processes them efficiently.
You can drag-and-drop files, browse to a folder, or add entire directory trees including subfolders.

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

4. Start MOS to JXL conversion
Click the Convert button to start. reaConverter will process all your files with the settings you selected.

When finished, your new .jxl files will be waiting in the destination folder.









