What is a .JXL file?
JPEG XL (JXL) is a modern image format offering high compression, lossless JPEG recompression and HDR.
- Did you know
- JPEG XL was standardised in 2022 and can losslessly recompress existing JPEG files to save space.
- JPEG XL was built by merging two rival proposals: Google’s PIK codec and Cloudinary’s FUIF.
- It is a royalty-free open standard, published as ISO/IEC 18181.
- JXL supports high dynamic range with up to 32 bits per channel, plus wide colour gamuts and transparency.
- Its JPEG recompression is bit-exact, so an old JPEG can be shrunk and later restored byte-for-byte.
- What Analyser shows you
- View EXIF, GPS, camera settings, histograms, dominant colours, OCR text, and AI-generation markers in JPG, PNG, HEIC, WebP, GIF, BMP, TIFF, AVIF and JPEG XL images. Detects computational-photo wrappers (Apple Live Photo, Google and Samsung Motion Photo, Ultra HDR gain maps), opens THM movie-thumbnail files, and extracts every embedded image from multi-image files - all sizes in an ICO, both halves of an MPO stereo pair, and every page of a multi-page TIFF.
- Open a .JXL file
- Drag a .JXL file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.