How to convert JP2 to JXL
To convert JP2 to JXL, upload your JP2 file, choose JXL as the output format and press Convert. The finished JXL file is ready to save to your phone or computer in seconds, free, with no watermark and no sign-up. Your file is deleted from our server about 30 minutes after the conversion.
This free online converter changes JP2 images into JXL files in seconds, with no software to install and no watermark. You can convert several files at once, resize them and choose the quality for formats that support it. Metadata such as location tags is removed from the output for privacy.
Why convert JP2 to JXL?
- Smaller than JPG with better quality
- Lossless and lossy modes
- HDR, alpha and animation
- Works with: Safari, some Chromium builds with flags, GIMP, Affinity and Krita
What to expect from this conversion
- JXL can be saved lossy or lossless. Quality 100 gives a lossless result where the format supports it, and lower values give smaller files.
- Transparency is kept in the JXL file.
- JPEG XL is new, and many browsers and apps cannot open it yet. Keep a JPG or PNG copy for sharing.
- Browsers do not display JXL files, so use it in editors, print workflows or development tools rather than on a web page.
JP2 vs JXL
| Property | JP2 | JXL |
|---|---|---|
| Full name | JPEG 2000 | JPEG XL |
| Released | 2000, Joint Photographic Experts Group | 2021, Joint Photographic Experts Group |
| Compression | Lossy or lossless | Lossy or lossless |
| Transparency | Yes | Yes |
| Animation | No | Yes |
| Bit depth | up to 16-bit | up to 32-bit float |
| Shown in browsers | No | No |
| Best for | digital libraries and archives; medical and geospatial images | future-proof photo archives; high-quality master images |
Steps to convert JP2 to JXL
- Drop your JP2 image file onto the converter, or click to choose it.
- Check that JXL is selected as the target and adjust the options if you want.
- Press Convert, then download your new JXL file when it finishes.
Tips for the best result
- Use quality 80 to 90 for photos: it is visually close to the original at a much smaller size.
- Set a width if the image will be shown on a small screen, which also reduces the file size.
- Choose a background colour before converting transparent images to a format without transparency.
Frequently asked questions
How do I convert JP2 to JXL?
Drop your JP2 files on the converter, confirm that JXL is the target and press Convert. Download each file or the whole batch as a ZIP.
Is the JP2 to JXL converter free?
Yes. It is free with no watermark, no sign-up and no limit on how many images you convert. The site is supported by ads.
Does converting JP2 to JXL reduce quality?
JXL can be saved lossy or lossless. Quality 100 gives a lossless result where the format supports it, and lower values give smaller files. The quality slider only affects formats that use lossy compression.
Will transparency be kept when I convert JP2 to JXL?
Yes. JXL supports transparency, so transparent areas stay transparent.
Which programs open JXL files?
JXL files open in Safari, some Chromium builds with flags, GIMP, Affinity and Krita.
How many images can I convert at once?
Up to 20 images per batch, each up to 60 MB. Files are deleted from the server about 30 minutes after conversion.