How to Convert Multiple Q3S Files to JXL?
1. Download and Install reaConverter
reaConverter is a standalone Windows app — download, install, and start converting Q3S files in under two minutes.
2. Load your Q3S files
Open reaConverter and import your .q3s 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 JXL as output format
Select JXL as target format and pick where to save results. You can keep default settings or fine-tune the output.

4. Start Q3S to JXL conversion
Hit Convert to process your files. The log window shows progress, timing, and status for every file.

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






