How to Convert Multiple JXL Images to AVIF?
1. Download and Install reaConverter Lite
reaConverter Lite is quick to download, easy to install, and ready to launch in seconds. This lightweight, standalone software is highly efficient at handling a wide range of batch image conversions. Plus, it lets you apply essential image editing options — such as resizing, rotating, or adjusting quality — during the conversion process.
2. Load your JXL files
Launch reaConverter and load the JXL files you want to convert. Add a few files or thousands, batch processing handles them all.
Drag-and-drop JXLs directly into reaConverter or use the folder browser to load entire directories.
3. Select AVIF as output format
Set AVIF as output format and select where to save your converted files. Customize quality settings if needed.
4. Start JXL to AVIF conversion
Press Convert to begin processing. You can watch the progress or minimize and let it run in the background.
Your converted AVIF files will appear in the destination folder as soon as processing completes.
JXL to AVIF: what carries over and what does not
JXL 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. JXL 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.
