How to convert BMP to JXL
To convert BMP to JXL, upload your BMP 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 BMP 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 BMP 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.
- 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.
BMP vs JXL
| Property | BMP | JXL |
|---|---|---|
| Full name | Windows Bitmap | JPEG XL |
| Released | 1986, Microsoft | 2021, Joint Photographic Experts Group |
| Compression | None (uncompressed) | Lossy or lossless |
| Transparency | No | Yes |
| Animation | No | Yes |
| Bit depth | 1 to 32-bit | up to 32-bit float |
| Shown in browsers | Yes | No |
| Best for | legacy Windows software; embedded devices | future-proof photo archives; high-quality master images |
Steps to convert BMP to JXL
- Drop your BMP 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 BMP to JXL?
Drop your BMP 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 BMP 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 BMP 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 BMP to JXL?
BMP images do not contain transparency, so there is nothing to lose. JXL supports it if you edit the image later.
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.