Convert images to JPEG XL (JXL) in bulk.
Compress images and free up space on your device.
Image quality will remain the same (visually lossless).

Max size: 200 MB per file

You can convert to JPEG XL (JXL) Learn more about JPEG XL (JXL) from


What is JXL?

Extension jxl
Category Image/Picture file formats
Developed by Joint Photographic Experts Group
Mime type image/jxl


JPEG XL (or JXL) is a new image format with better compression than other image formats like legacy JPEG, PNG, WebP, AVIF and others. Designed for the modern web and with professional photography in mind, JPEG XL offers a more efficient way of storing images. In addition to supporting alpha channels/transparency, lossless, progressive loading and animations, the new image format promises high speed encoding and decoding even on phones.

JPEG XL has experimental support in Firefox, Chrome and other Chromium-based browsers like Edge. For now, you need to enable a feature flag for the browsers to display JXL images.

MConverter’s conversions from JPEG XL are lossless, so there is no reduction in the quality of your images.
When converting from JPG or GIF to JXL, the quality is mathematically lossless. In all other cases when converting to JXL, the image quality is kept visually lossless. Your images will look visually identical.

Common questions about converting to JXL

How to free up space when I have lots of photos I don't want to delete?

Use MConverter to convert your images to JXL. It's a newer format which uses more efficient compression.
This way, your photos will take up less space, while their quality remains visually identical as before.
After you have downloaded your converted photos, you can delete the original image files from your phone or computer, and enjoy the extra free space.
Later, when you wish to view your old photos, you may convert them to PNG without losing quality, or to JPG.

Can I convert to JXL in bulk?

Yes, MConverter supports batch converting to JXL. You can even drag and drop folders to convert to JXL.
Pasting files and folders copied in the clipboard also works: use Ctrl+V.

Can I convert a file to JXL, if its size is 1 GB?

Yes, with MConverter Premium you can convert big files, up to 1 gigabyte each.
The free version lets you convert files up to 200 MB. If you need to convert files over 200 megabytes to JXL, try MConverter Premium.

Is converting to JXL safe with MConverter?

Yes, we encrypt your connection using industry standards. Plus, your files are only accessible by you. 24 hours after the conversion completes, they are automatically deleted from MConverter’s servers. You can also delete your files immediately after finishing the conversion by clicking the bin icon.
Join others who have trusted us to convert over 2,639,318 files so far.

How long does it take to convert a file to JXL?

For most images, the wait should be less than a minute. If they are animated, it may take a little longer. However, MConverter also supports converting larger images, meaning that it could take a while (up to over an hour, for example).
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