Compatibility Warning
minijxl cannot run. Your browser is missing required features:
Please use an up-to-date browser like Chrome, Firefox, Safari, or Edge.
JPEG XL Support
Native JPEG XL display was not detected. minijxl can still create and preview .jxl files here; Safari 17+ can open them directly.
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Today's Impact
Estimated Downstream Savings
Assumes 10% of images are shared, each downloaded 3 more times.
How it works
libjxl runs in your browser via WebAssembly. You get compact JPEG XL files with lossy, lossless, alpha, metadata options, and support for 15+ input formats.
Nothing uploads. Nothing tracks you (stats are optional and anonymous).
Privacy
Your images never leave your device. Anonymous usage stats (image counts, bandwidth saved) are optional. IPs are used only for rate limiting and never stored with stats.
Credits
Built with libjxl, jxl-oxide, Emscripten, PDF.js, libheif-js, geotiff.js, @jsquash/avif, resvg-wasm, fflate, and ExifReader. Globe texture by Solar System Scope (CC BY 4.0).
Terms
Free, as-is, no warranties. Keep backups of your originals. Don't use it for evil.