Your files stay on your device
JFI to JXL
Convert JPEG Image to JPEG XL Image in your browser.
JFIJXL
Drop your JFI files here
or click to browse from your device
Supports: JFI
Conversion re-encodes pixels: EXIF metadata and color profiles are not carried over, EXIF rotation is applied, and animated GIF, WebP, and AVIF inputs keep only their first frame (flagged on the result). Inputs are validated by their actual bytes, and every output is signature-checked before it counts as done.
From
To
JFI → JXL has no direct reverse route.
Decoder
Encoder
JXL encoder options
Quality90%
JPEG XL effort7
Higher = slower encode, better compression.These knobs map straight onto the vendored encoder. The row meta names the encoder that actually ran, plus the size delta.
Preferences are saved on this device and reused across conversions.
Nothing in yet
Paste, drop, or type to begin. Everything stays on this device.