Inspect JPEG XL metadata, compression mode, color depth, HDR capabilities, and get optimization recommendations for your JXL files. JPEG XL offers superior compression and quality. Need to convert? Try our JXL to JPG or JXL to PNG converters.
A score from 0-100 based on compression efficiency, file structure, and format utilization. Higher scores indicate well-optimized JXL files that leverage the format's capabilities effectively.
Variable DCT compression optimized for photographs. Offers excellent quality-to-size ratio for natural images. Similar to JPEG but with better quality at equivalent sizes.
Supports both lossless and near-lossless compression. Ideal for graphics, screenshots, and archival. Can preserve every pixel while still achieving good compression.
Use VarDCT mode with distance 1-2 for photographs. JXL outperforms JPEG at equivalent file sizes while supporting HDR and wide color gamuts. Perfect for converting your JPG collection.
JXL's lossless mode is excellent for archival - better compression than PNG while supporting high bit depths, HDR, and wide color gamuts. Use distance 0 for perfect preservation.
JXL natively supports HDR with up to 32-bit float precision. It's one of the few web-compatible formats that can preserve the full dynamic range of HDR photographs.
Pro tip: JXL can losslessly transcode existing JPEG files, preserving exact quality while reducing file size by 20%. Try our JPG to JXL converter.
JPEG XL is a next-generation image format designed to replace JPEG, PNG, and GIF. It offers superior compression (30-60% smaller than JPEG at equal quality), supports HDR, animation, transparency, and can losslessly recompress existing JPEGs. It's developed by the JPEG committee and is royalty-free.
The quality score (0-100) evaluates your JXL based on compression efficiency, format feature utilization, and file structure. Higher scores indicate files that effectively use JXL's capabilities. Very small files or parsing issues will lower the score.
VarDCT (Variable DCT) is optimized for photographs and natural images - it's always lossy but achieves excellent compression. Modular mode supports both lossless and lossy compression, making it ideal for graphics, screenshots, and archival where pixel-perfect preservation matters.
Yes, all uploaded files are automatically deleted from our servers within one hour. We do not store, share, or analyze your files beyond providing the analysis results you see on screen. Your data remains private and secure.
JXL was designed as a JPEG successor and can do everything JPEG does, plus much more. However, browser support is still limited. For web use today, keep JPEG or WebP fallbacks. For archival and professional workflows, JXL is an excellent choice now.