JXL to QOI converter
A free JXL to QOI converter for JPEG XL files. Browser-based pairs here usually run in this tab, with no file upload.
Drop your JXL files here
or browse your device · paste with Ctrl+V
Accepts .jxl files. You can queue several files; each is processed one after another on your own device.
Your files never leave this device — there is no upload and no server to delete them from.
- 01
Add your JXL files
Drop them onto the box above or click to browse. They are read straight from disk — nothing is sent anywhere.
- 02
Check the settings
QOI is already selected. Open the gear icon on any row if you want to change quality, dimensions or codec before converting.
- 03
Download your QOI
Press convert and wait for the row to finish. Convert several files and you can take them all as a single ZIP.
JXL
JPEG XLThe most technically impressive format of the lot: better compression than AVIF, progressive decoding, and lossless JPEG recompression that shrinks existing photos ~20% with zero quality loss. Browser adoption has been slow and political.
- Developed by
- JPEG Committee
- Released
- 2022
- Extension
- .jxl
- MIME type
- image/jxl
- Compression
- Lossy or lossless
- Specification
- Open
QOI
Quite OK Image FormatA lossless format whose entire specification fits on one page, encoding and decoding many times faster than PNG for a small size penalty. A favourite in game engines and hobby projects.
- Developed by
- Dominic Szablewski
- Released
- 2021
- Extension
- .qoi
- MIME type
- image/qoi
- Compression
- Lossless
- Specification
- Open
- QOI stores the incoming samples as provided, so this step does not add generic quality loss. If the source JXL was already lossy, those earlier losses remain.
Questions about converting JXL to QOI
Is this JXL to QOI converter free?
Yes. Converting JXL to QOI here is free, with no account, no watermark and no daily quota. The work runs on your own device, so there is no server cost to pass on to you.
Is my JXL file uploaded anywhere?
For browser-based pairs, your file is read locally and converted by Squoosh in this tab. No file payload is uploaded; you may still see analytics and engine downloads in network logs.
Is there a file-size limit for JXL to QOI?
There is no imposed upload cap when it runs in-browser, but each conversion still depends on your device and browser memory. Large videos are the first practical limit, then memory-heavy documents or images.
Does converting JXL to QOI lose quality?
No. QOI stores its data losslessly, so everything in your JXL file is preserved exactly.
Can I convert several JXL files to QOI at once?
Yes. Drop in several files and each gets its own row; they are processed one after another on your device. You can download them one by one or as one ZIP.
Does JXL to QOI work on a phone, Mac or Chromebook?
Most modern browsers on Windows, macOS, Linux, ChromeOS, Android and iOS work. Very large videos are often more reliable on desktop or a browser with more memory.
Why do some conversions take longer on first run?
The conversion engine has to download first. Small codec bundles are fast, while ffmpeg is commonly 12–30 MB; later conversions of similar type use the cached engine.
I converted a file and the output is blank or unusable. What should I check?
Start over with default settings, then change one option at a time (quality, bitrate, page size, or codec) to isolate what changed behavior. If it keeps failing, retry with a smaller file and confirm the source format matches the pair.
Convert other formats to QOI
16 formats can become QOI here.
Convert JXL to other formats
A JXL file can become any of these.
QOI to JXL
The reverse conversion
JXL to JPG
JXL to PDF
JXL to PNG
Images to PDF
Turn photos or scans into a single PDF document.…
Compress Image
Make images smaller while keeping the same format.…
Resize Image
Change the pixel dimensions of one image or a whole …
Rotate & Flip Image
Turn images by 90 degrees or mirror them.…