Convert FITS to JXL

If you're looking for a reliable and efficient software tool to convert your FITS files to JXL format with ease, you can count on reaConverter.

reaConverter is an advanced FITS to JXL conversion software. It also includes batch processing capabilities that allow you to automate repetitive tasks, enabling lightning-fast conversions of hundreds of files at once while preserving quality.

1. Download and Install reaConverter

reaConverter is quick to download, install and launch. This standalone software is extremely efficient in managing a wide range of batch conversions. At the same time, it will allow you to apply image editing options during conversion.

Install reaConverter

2. Load your FITS files

Start reaConverter and load all the .fits files you intend to convert into .jxl. The software supports multiple FITS conversion and processes all files locally on your computer.

Select FITSs from a folder or by drag-and-dropping them directly into the reaConverter window.

3. Select JXL as output format

Pick the JXL as output format and choose the destination folder where you want to save new .jxl files.

4. Start FITS to JXL conversion

Then simply press Convert button and your conversion will begin in no time!

Once the conversion is complete, you can find your JXL files in the destination folder you selected.

FITS to JXL offline

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

Download Free Trial

Do more with your images

Converting FITS images for use in a larger project? With reaConverter, you can convert, edit, and enhance your images in one streamlined process.

Our range of editing options includes such image processing actions as Resize, Rotate, Crop, Color Replace, Watermarks and more. Adjust actions include RGB, HLS, HSV, Brightness and Contrast. Auto-processing options are also available, such as auto-rotate and auto-crop.

Image editing tools

User Reviews

Average User Rating:
Last updated on April 24, 2025

"Essential for our astroimaging pipeline! reaConverter perfectly handles FITS files from our research telescope, preserving all WCS coordinates and photometric data during batch conversion to TIFF. Now we process 100+ deep-sky exposures nightly without losing critical metadata for our exoplanet studies!"

Joseph Wilson

Satisfied Customer

"reaConverter makes FITS conversion incredibly easy. We batch convert astronomical images to standard formats for presentations and analysis, all automated through the command-line. It’s fast, reliable, and handles large datasets without issues."

Laura N.

Astrophysics Research Assistant

"Your solution was buried deeper in search results than it should be. After struggling with unclear alternatives, I found your guides — finally, instructions that made sense for a first-time user like me. Excellent work!"

Richard E. Miller

Satisfied Customer

"Converts files in seconds! Finally a tool that's both fast and simple to use."

Wei Chen

Happy User

"I'd been searching for reliable conversion software forever — reaConverter has everything I need! After installing and watching the tutorial, I had my files converted to the perfect format in minutes. Flawless experience!"

Sanjay Mehta

Satisfied Customer

"An excellent program! I use it regularly in my work — it supports nearly every file format imaginable. The interface is intuitive and runs flawlessly every time."

Roger Cook

Happy User

FITS to JXL Conversion: FAQ

Can reaConverter convert FITS to JXL?

Yes! reaConverter instantly converts .fits 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.

What is reaConverter used for?

reaConverter is a software program used for converting images and other types of files from one format to another. It supports a wide range of file formats and allows users to convert multiple files at once, making it a valuable tool for graphic designers, photographers, and other professionals who work with digital images. reaConverter also includes features for resizing, cropping, and editing images, along with batch processing capabilities that help automate repetitive tasks.

Can I convert FITS to JXL online?

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

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

The best way to change FITSs 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 FITS to JXL.

How can I automate FITS 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 FITS 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 fits to jxl converter for batch processing.

What else can I do with reaConverter?

Convert Gerber files Crop images Change file creation date Convert RAW files Convert PDF files