JPEG XL (JXL) Converter • Online & Free • MConverter

Batch convert from JPEG XL (JXL) to other formats.
Large JPEG XL (JXL) files are supported.

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Common questions about JXL conversions

How to open a JXL file?

If you don't know how to view a JXL file, you can convert it with MConverter to another format you already recognize.

Is converting JXLs safe with MConverter?

For cloud-based conversions, MConverter encrypts your JXL files using the latest technologies, such as TLS 1.3 and HSTS. They are transmitted securely to our cloud service provider’s EU-based data center, which holds internationally recognized ISO 27001 and SOC 2 certifications. There, each conversion is processed in a separate, isolated environment. This technique further reduces the risk of a malicious file impacting other conversions.
Four hours after the conversion is complete, your files are automatically deleted from MConverter’s systems. You can also permanently delete your JXLs and other converted files immediately after finishing the conversion with the trash icon.
When converting on-device, your files never leave your device. MConverter processes them locally. Note: on-device conversions are not yet available for some hardware-intensive formats.
For both cloud and on-device conversions, your files are never scanned or shared with third parties for marketing purposes.
Join thousands who have trusted MConverter to process over 20,519,712 files so far.

Can I convert JXL files in bulk?

Yes, MConverter supports batch converting of multiple JXL files at once. You can even drag and drop folders containing JXLs.
Pasting JXL files and folders copied in the clipboard also works: use Ctrl+V.

Can I convert a JXL file, if its size is 10 GB?

Yes, with MConverter Max you can convert big JXLs, up to 10 gigabytes each.
The free version lets you convert files up to 100 MB. If you need to convert JXL files over 100 megabytes, try MConverter Max. If your files aren’t over 1 GB, then you can use MConverter Plus instead, as it’s cheaper.

How long does it take to convert 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).

What is a JXL file?

File extension	.jxl
Category	Image file formats
Developed by	Joint Photographic Experts Group
Mime type	image/jxl

Format description

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 these browsers to display JXL images. Safari supports only non-animated JPEG XL images since late 2023.

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