Convert GUN to JXL

Bulk GUN to JXL conversion with consistent results. Set it up once, process thousands of files with the same quality every time.

Looking to change GUN files to JXL format? reaConverter makes it simple — add your files, select output format, and convert entire folders in one click. Runs entirely on your hardware for maximum speed — no waiting for uploads or server queues.

1. Download and Install reaConverter

reaConverter installs quickly on any Windows PC. No dependencies, no bloatware — just a clean setup that's ready to use immediately.

Install reaConverter

2. Load your GUN files

Start reaConverter and add your .gun files. The software processes everything locally, so your files never leave your computer.

Use drag-and-drop, folder browser, or right-click conversion from Explorer.

3. Select JXL as output format

Select JXL from 700+ supported output formats. Choose your destination folder and adjust settings to match your needs.

4. Start GUN to JXL conversion

Click Convert to start the batch. reaConverter processes files quickly and shows you the status of each one.

Once done, reaConverter shows a summary. Click 'Show converted files' to jump straight to your JXL output.

GUN to JXL Converter

reaConverter offers the fastest, simplest solution for converting your GUN files into JXL in seconds - all files processed on your PC for maximum privacy and speed.

Download Free Trial

Do more with your files

Converting GUN files for use in a workflow? reaConverter offers many ways to process files, so you can customize them according to your requirements.

Our range of editing options includes auto-processing options such as auto-rotate, auto-crop, watermarking and more. Change Color Space, copy Metadata, set DPI, manage ICC Profile, control Bit Depth.

Conversion features

User Reviews

Average User Rating:
Last updated on January 13, 2026

"Switching to JXL format with reaConverter was effortless. The compression is incredible - my images look perfect at half the file size of JPEGs. The batch conversion works flawlessly, saving me storage space without sacrificing quality. JXL is clearly the future, and reaConverter makes adoption painless!"

Mark T.

Satisfied Customer

"reaConverter’s Watch Folders feature has transformed my workflow! I set it to automatically convert my images to JXL, and now every new file I add gets optimized instantly. JXL keeps my photos crisp at half the file size of JPEGs. Super easy setup, flawless results – a must for batch processing!"

Alex R.

Photographer

"5/5⭐ Finally! Does what it promises - converts AND tweaks images without complicated menus. Perfect for quick jobs."

J. Mitchell

Satisfied Customer

"reaConverter is pure gold! Rock-solid performance with zero crashes. No internet needed—perfect for travel or low-connectivity work. The ultimate offline alternative to sketchy web converters. Plus, the desktop version keeps sensitive files secure since nothing ever gets uploaded to the cloud."

Malik T. Martin

Satisfied Customer

"I was skeptical at first, but reaConverter exceeded my expectations. The interface is intuitive, and the advanced settings let me tweak outputs perfectly. Plus, the customer support is fantastic!"

Sarah Lane

Satisfied Customer

"Finally an app that actually opens my weird files! Saves me from format frustration daily."

Kyle Brooks

Happy User

GUN to JXL Conversion: FAQ

Can reaConverter convert GUN to JXL?

Yes! reaConverter instantly converts .gun to .jxl with perfect quality preservation. With its batch processing feature, you can convert multiple files at once in just a few clicks. You can even convert images directly from Windows Explorer using the right-click menu — fast and convenient.

Can I convert GUN to JXL online?

If you only need to convert a few GUN files to JXL format, feel free to try our free online free online GUN to JXL converter — perfect for small batches with no installation needed!

How can I turn GUN files into JXL on my computer?

The best way to change GUNs to JXLs on your PC is to install a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch files conversions, including conversion from GUN to JXL.

How can I automate GUN to JXL files conversion?

reaConverter supports all the most useful automation features such as right-click сonversion and Watch Folders for the most efficient automated files conversion in any software of this type.

Is there a way to convert GUN files to JXL using the command prompt?

reaConverter provides full access to all its features via Windows command line, including a high-performance command-line gun to jxl converter for batch processing.

What else can I do with reaConverter?

Copy IPTC data Convert vector images Convert picture color space Convert Gerber images Crop picture