What is JPEG XL (JXL)?
JPEG XL (file extension .jxl) is a modern image format built to
succeed the original JPEG — smaller files, higher quality, and features JPEG never
had. It's powerful, but barely supported, which is why a .jxl you
downloaded may refuse to open. Here's what the format is, why it won't open, and how
to convert it so you can actually use it.
Convert a JPEG XL file, or create one
JPEG XL to JPG
Make a .jxl easy to open, share and upload anywhere.
.jxl → .pngJPEG XL to PNG
Convert to PNG for lossless output or transparency.
.jpg → .jxlJPG to JPEG XL
Re-encode photos smaller at the same visual quality.
.png → .jxlPNG to JPEG XL
Compress PNGs while keeping transparency intact.
A next-generation image format
JPEG XL was standardised (ISO/IEC 18181) and finalised around 2021 by the same committee behind the original JPEG. It's royalty-free and designed as a single format that does everything: it compresses photos roughly 20–60% smaller than JPEG at the same visual quality, and supports both a true lossless mode and an efficient lossy one.
Beyond size, it adds what JPEG lacked — full alpha transparency, animation, progressive loading, very high bit depth and wide colour gamut, and the ability to losslessly recompress an existing JPEG about 20% smaller with no quality change. On paper it's an excellent replacement. The catch is support.
Why won't my .jxl file open?
Because most software still can't read it. As of 2026, browser and OS support looks like this:
- Safari (macOS & iOS 17+): supported — Apple added JPEG XL in 2023, so it opens in Safari, Preview and Quick Look.
- Chrome & Edge: not supported — Chrome removed its experimental flag in version 110 (early 2023) and hasn't shipped it since.
- Firefox: only behind a developer flag in Nightly builds, off by default.
- Windows, Android & most editors: no native support without a plugin.
So unless you're on a recent Apple device, a .jxl file usually won't open
at all. The reliable fix is to convert it to a format everything supports —
JXL to PNG for a lossless copy
with transparency, or JXL to JPG
for a small file that opens anywhere.
JPEG XL vs AVIF, WebP, PNG and JPG
How JPEG XL stacks up against the formats you'll actually convert it to:
| Format | Compression | Lossless | Transparency | Browser support | Best for |
|---|---|---|---|---|---|
| JPEG XL | Excellent | Yes | Yes | Safari only | Future-proofing, once supported |
| AVIF | Excellent | Limited | Yes | Wide | Smallest modern web images |
| WebP | Very good | Yes | Yes | Universal | General-purpose web use |
| PNG | Lossless only | Yes | Yes | Universal | Graphics, transparency, exact copies |
| JPG | Good (lossy) | No | No | Universal | Photos that open anywhere |
How to open or convert a .jxl file
Since most apps can't open JPEG XL, the practical answer is to convert it to something universal. Both tools below run entirely in your browser — your file is decoded locally and never uploaded to a server:
Need it to open anywhere, or to keep the file small? Use the JXL to JPG converter. JPG opens in virtually every app on every platform, with adjustable quality.
Need transparency, or a lossless copy for editing? Use JXL to PNG instead — PNG is lossless and preserves the alpha channel exactly.
Convert a JXL fileHow to create a .jxl file
Want to go the other way and encode to JPEG XL — say, to archive a photo library
at a smaller size? These converters also run entirely in your browser, so your images are
never uploaded. Just remember a .jxl file only opens in Safari and recent
Apple devices today, so it's best for storage rather than sharing.
Starting from a photo? Use the JPG to JXL converter to re-encode JPGs smaller at the same visual quality.
Need transparency kept? Use PNG to JXL — it preserves the alpha channel while shrinking the file.
Frequently asked
How do I open a .jxl file?
On a recent Apple device, Safari and the built-in Preview/Quick Look open .jxl files directly. On Windows, Android, or in Chrome, Edge and Firefox they usually won't open at all — the simplest fix is to convert it to JPG or to PNG.
Is JPEG XL better than AVIF or WebP?
Technically JPEG XL matches or beats both on compression and adds features like lossless JPEG recompression and very high bit depth. In practice AVIF and WebP win today because they work in every major browser and JPEG XL doesn't. For anything you need to share now, AVIF or WebP are the safer choice.
Why did Chrome remove JPEG XL?
Chrome had JPEG XL behind an experimental flag, then removed that support in Chrome 110 (early 2023), citing insufficient ecosystem interest and maintenance cost. Edge follows Chrome. As of 2026 neither ships support, so a .jxl file won't display in those browsers.
Is JPEG XL lossless?
It can be both. JPEG XL supports a true lossless mode that stores every pixel exactly, and a lossy mode that trades some detail for much smaller files. It can also losslessly recompress an existing JPEG to roughly 20% smaller with no quality change.
Will JPEG XL replace JPEG?
That was the goal, and it still might over time — JPEG XL is royalty-free and technically strong. But adoption depends on browsers and operating systems shipping support. Until Chrome and Firefox enable it by default, JPEG remains the universal default.
How do I create a .jxl file?
Encode an existing image to JPEG XL right in your browser — PNG to JXL keeps transparency, and JPG to JXL re-encodes photos smaller. Because .jxl only opens in Safari and recent Apple devices today, it's best for storage or archiving rather than sharing.