Convert JXL to JPG
Turn JPEG XL files into ordinary JPGs that open in every app, without sending them anywhere.
- Nothing is uploaded
- Works offline after first visit
- Open source
- No watermark · limit is your device’s memory; phones hold less
Convert JPEG XL (.jxl) images to JPG in your browser with a quality slider. It is free, needs no account and adds no watermark, and your files are not uploaded: everything runs in your browser on your device. The size limit is your device’s memory, and phones hold less; give the page a short while after one visit to save itself for offline use, and then it works offline.
Done
Free, no ads. Support StayPut
Open the network tab. Your files never appear in it.
Add files and run the tool to see every request this tab makes.
Your files are processed on this device and never sent to a server. Reload the page to clear everything from memory.
JPEG XL promises to replace JPEG one day, but today a .jxl file will not open in Chrome, Firefox, Windows Photos or most editors. Converting to JPG gives you a file that works everywhere, at a size close to the original.
The decoding happens in this tab with libjxl compiled to WebAssembly (Safari uses its built-in decoder). The pixels are then encoded as JPG by your browser at the quality you pick. Transparent areas, which JPG cannot store, are filled with the background colour you choose.
Have another type of picture? Convert any image to JPG takes PNG, WebP, HEIC, GIF, BMP, AVIF and more.
How it works
- Drop your JXL files onto the page, or tap to pick them. Batches are fine.
- Adjust the quality slider if you want a smaller file, or leave it at 90.
- Download each JPG, or all of them as one zip.
In your browser, not on a server
Stayput first reads the opening bytes of each file, where every image format writes its signature, so it knows what the file really is whatever it is called. Your browser decodes JPG, PNG, WebP, GIF, BMP, AVIF and SVG itself; TIFF goes through UTIF.js, HEIC through the libheif WebAssembly decoder, and JPEG XL (or AVIF, in a browser without native support) through the Squoosh decoders, all served from this site and cached. The browser re-encodes JPG, PNG and WebP; PDF, ICO, GIF, BMP and TIFF files are written by small encoders in the page. Nothing here needs a server.
Compared with upload-based tools: Online converters upload your image, convert it on their machine, keep it for hours and cap you at a few files a day. This does the same conversion on your device, for as many files as your device’s memory can hold, with no upload to wait for.
Verify it yourself. Give the page a short while after one visit to save itself for offline use, then turn off Wi-Fi or switch to airplane mode and run the tool again. Or open your browser's developer tools (F12, or Cmd-Option-I on a Mac), pick the Network tab, and watch it while you convert. The panel above does the same count for you.
Questions
Is the conversion lossless?
No. JPG is lossy, so a little detail is discarded when the pixels are re-encoded. At quality 90 the difference is invisible for photos. Use the JXL to PNG page for a lossless copy.
Are my files uploaded?
No. The decoder is a program file served from this site, downloaded once and cached; your images are decoded and re-encoded inside your browser tab and never travel anywhere.
Can I convert many files at once?
Yes. Drop a folder’s worth of .jxl files and download them one by one or as a single zip.
More image tools
Image Converter
Drop any image, see what it really is, pick what you need. Converted on your device.
AI image upscaler
Make a small picture bigger and sharper with a neural network that runs on this device.
Remove object from photo
Paint over what should not be there and let a small AI fill it in, on this device.
Adjust photo
Brightness, contrast, saturation, warmth, sharpening and invert, previewed live and made on this device.
Other conversions
Guides
- Is FreeConvert safe?FreeConvert is a legitimate service with a clear deletion policy. Whether it is safe for a particular file depends on whether that file should be uploaded anywhere.
- Is Convertio safe?Convertio is a well-known converter with a published deletion policy. For private files, the safer choice is a converter that never receives them.
- Is Zamzar safe?Zamzar is one of the oldest online converters. Its storage window is longer than most, which is the detail worth knowing.
- A free CloudConvert alternative for everyday filesCloudConvert measures its free tier in credits tied to conversion time, not files, which makes it hard to predict when you will hit the limit. Here is an alternative with nothing to meter.
- A free Convertio alternative with no file size capConvertio's free plan caps both file size and how many conversions you get per day. Here is an alternative with no such ceiling.