How to Convert Multiple VSI Images to AVIF?
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. You can also resize, crop, and adjust images during conversion.
2. Load your VSI files
Load your VSI files into reaConverter. You can add individual files or point to folders, and the software will queue everything automatically.
Select VSIs from a folder or drag-and-drop them directly into the reaConverter window.
3. Select AVIF as output format
Choose AVIF for output and set your save location. reaConverter lets you customize quality and apply edits before conversion.
4. Start VSI to AVIF 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 .avif files in the output location. The log shows details for each conversion.
How VSI and AVIF differ in practice
VSI carries 16 bits per channel and AVIF carries 12, 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 a 12-bit format only at the very end. VSI and AVIF both compress by discarding data, so this is a re-encode rather than a copy. The output is built from already-compressed pixels, and the artefacts of the first encode are carried into the second. Use a high quality setting, and convert from the original whenever you still have it.
