JPEG XL is technically ahead of every other image format. It's also supported by roughly 15% of the tools you actually use. Convert to JPG or PNG to reach the world; convert to JXL to save space when your pipeline handles it.
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Drop .jxl files for conversion out, or drop JPG/PNG/WebP for encoding to JXL.
libjxl compiled to WebAssembly handles both encode and decode. JXL encode runs slower than other formats — 2–5 seconds per image for high-quality settings.
JXL to JPG/PNG/WebP for universal compatibility. Other formats to JXL for maximum compression or archive use.
Convert images between these related converters
JXL outcompresses AVIF, supports lossless JPEG re-compression, handles animation, HDR, and 32-bit float. Browser adoption stalled after Chrome dropped it in 2022. Convert freely, watch adoption improve.
JXL Converter features
accurate encode and decode using the specification codec
JXL → JPG/PNG/WebP and JPG/PNG/WebP → JXL
10-bit, 12-bit, Rec.2020, and wide-gamut color
files never leave your browser tab
Format adoption, compression quality, and use cases.
For archival and pipelines you control: yes, compression gains are substantial vs JPG (40–50%), and lossless JPEG re-compression preserves the original bitstream. For public web: no — Chrome dropped native support in 2022, leaving ~15% browser coverage. Use WebP or AVIF for web.
JXL is typically 5–15% smaller than AVIF at matched quality. More importantly, JXL supports lossless JPEG transcoding (no decode + re-encode loss) — something AVIF can't do. For lossless archiving, JXL wins clearly.
Chrome 110 (Jan 2023) removed the experimental flag citing insufficient developer ecosystem adoption and unresolved standardization concerns. The format is maintained, Firefox and Safari support it, and Chrome may re-add it — but the setback cost 2+ years of momentum.
Yes. JXL animation support is part of the spec and handles arbitrary frame sequences with full color and per-frame timing. Practically, encoder and decoder support for animated JXL is limited to a few tools currently.
JXL-to-JPEG lossless re-encoding (storing the JPEG bitstream inside JXL for perfect recovery) isn't available in browser-side conversion — that's a server-side pipeline task. Our converter does standard decode → re-encode via libjxl.
50 MB per file for both JXL input and output. Lossless JXL of large photos can be large (similar to PNG size). Lossy JXL is compact — similar to or smaller than equivalent JPEG.