How to Convert Multiple FITS Images to JPEG?
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. Apply image edits like resize, crop, or color adjustment while converting.
2. Load your FITS files
Load your FITS files into reaConverter. You can add individual files or point to folders, and the software will queue everything automatically.
Select FITSs from a folder or drag-and-drop them directly into the reaConverter window.
3. Select JPEG as output format
Choose JPEG for output and set your save location. reaConverter lets you customize quality and apply edits before conversion.
4. Start FITS to JPEG conversion
Press the Convert button and reaConverter takes care of the rest. Processing time depends on file size and volume.
After processing, find all your new .jpeg files in the output location. The log shows details for each conversion.
FITS to JPEG: what to expect from the conversion
FITS stores 32-bit greyscale covering the full dynamic range of the scan, and JPEG shows 8 bits. The conversion applies a window level, so what ends up visible depends on the window you choose. Decide separately whether patient metadata should be copied to the output or stripped from it. FITS carries 32 bits per channel and JPEG carries 8, so tonal steps get coarser during conversion. It shows up first in smooth gradients such as skies. If the result will be edited further, move to an 8-bit format only at the very end.
