How to Convert Multiple JFIF Images to AVIF?
1. Download and Install reaConverter
First, grab reaConverter from the download button below. Installation is fast, and the software runs offline — no account or signup needed. Need edits? Resize, rotate, or add watermarks during conversion.
2. Load your JFIF files
Launch reaConverter and drop in your JFIF files. The software queues everything for batch processing with consistent settings.
Add files by dragging them in, browsing folders, or using the right-click menu from Windows Explorer.

3. Select AVIF as output format
Pick AVIF as output format and choose the destination folder where you want to save new .avif files.

4. Start JFIF to AVIF conversion
Then simply press the Convert button and your conversion will begin in no time!

Once the conversion is complete, you can find your AVIF files in the destination folder you selected.
What changes when you convert JFIF to AVIF
JFIF 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.









