JPEG XL image Viewer is a fast and light weight JPEG XL file viewer and converter for Android. JPEG XL files can be opened using the system built-in file browser or the app can be called from an external application. Supported conversion format: - PDF - JPEG - PNG - WEBP JPEG XL generally has better compression than WebP, JPEG, PNG and GIF and is designed to supersede them. JPEG XL competes with AVIF which has similar compression quality but fewer features overall.