JPEG XL Converter — Open & Convert .jxl Files
JPEG XL (.jxl) is a modern image format that delivers smaller files than JPEG at the same or better quality, with support for lossless mode, transparency and HDR. Browser support has been arriving in stages: Safari displays .jxl still images since version 17 (2023), Firefox enables it by default as of version 157 (September 2026), and Chrome has merged a decoder though it is not on by default yet. Outside the browser, though — photo editors, social platforms, messaging apps and most operating systems — .jxl support is still patchy, which is why you often need to convert it.
Every converter below decodes your .jxl locally in the browser using a WebAssembly JPEG XL decoder. Your files are never uploaded, never stored, never seen by anyone — no account, no watermark, no usage limit, and it keeps working offline once the page loads. Not sure which to pick? JXL → JPG for maximum compatibility, JXL → PNG for lossless output with transparency, JXL → WebP or JXL → AVIF to stay small for the web, or JXL → PDF to turn images into a document.
Choose what to convert your JPEG XL file to
- JPEG XL → JPGConvert .jxl to JPG using WebAssembly. No uploads, works offline.
- JPEG XL → PNGConvert .jxl to lossless PNG. Browser-based, no uploads. Keeps transparency.
- JPEG XL → WebPConvert .jxl to WebP with quality control. Browser-based, no uploads.
- JPEG XL → PDFTurn .jxl images into PDF. Each image becomes its own page, sized to the image.
- JPEG XL → AVIFConvert JPEG XL to AVIF with a quality slider. Local, via WebAssembly.
Frequently asked questions
What is JPEG XL (.jxl)?
JPEG XL is the successor to JPEG. It compresses photos more efficiently than the decades-old JPEG format at equal or better visual quality, and it supports features JPEG lacks — true lossless mode, transparency and high dynamic range (HDR). Files use the .jxl extension.
Which browsers can open .jxl files?
Safari has displayed .jxl still images since version 17 (2023), and Firefox enables JPEG XL by default as of version 157 (September 2026). Chrome has merged a decoder but it is not enabled by default yet. Support outside browsers — in editors, apps and operating systems — is still limited, which is exactly why conversion tools exist.
Which format should I convert JPEG XL to?
Choose JPG for the widest compatibility across every device and app. Choose PNG when you need a lossless file or transparency. Choose WebP or AVIF for another compact web format, or PDF to bundle images into a document. When in doubt, JXL → JPG opens everywhere.
Are my .jxl files uploaded to a server?
No. Decoding and conversion happen entirely in your browser via WebAssembly. Your images never leave your device, so there is nothing to upload, no queue, no daily limit and no watermark. You can disconnect from the internet after the page loads and it still works.