FITS → JXR · Windows

Convert FITS to JXR

Convert FITS to JXR on your own machine instead of an upload form. reaConverter processes everything locally, with no size limits.

FITS to JXR conversion is faster with the right tool. reaConverter handles everything from a few files to thousands in one batch. Processes files consistently every time, with full control over quality and output settings.

DownloadFITS to JXR ConverterConvert
FITS to JXR
Online
.fits.JXR
4.8

Converting files since 2001

Runs offline — nothing uploaded

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How to Convert Multiple .fits Images to .jxr?

1. Download and Install reaConverter

reaConverter is a standalone Windows app — download, install, and start converting FITS files in under two minutes. Built-in editing tools let you resize, crop, or watermark as you convert.

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Install reaConverter

2. Load your FITS files

Open reaConverter and import your .fits files. No file limits, no slowdowns. Add as many as you need.

Drag files into the window, use the Add Files button, or select entire folders.

Load your FITS files into reaConverter

3. Select JXR as output format

Select JXR as target format and pick where to save results. You can keep default settings or fine-tune the output.

Select JXR as output format

4. Start FITS to JXR conversion

Hit Convert to process your files. The log window shows progress, timing, and status for every file.

Start Conversion

Conversion complete? Your JXR files are saved to the destination folder, ready to use.

Step by step

How It Works

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

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Technical note

FITS to JXR: what carries over and what does not

A scientific camera records 32 bits per pixel, and the signal of interest often occupies a narrow slice of that range, while JXR shows 8. Conversion applies a display mapping, so two acquisitions that look identical afterwards can hold very different underlying intensities. Treat the JXR output as something to look at and publish rather than something to measure. One FITS file can hold several pages or frames, while JXR holds one image each. reaConverter writes a separate output file per page and numbers them, so a single input can produce a whole folder of results.

Power Features

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
Image editing

User reviews

What people say after the first batch

Average User Rating:4.8
Last updated on September 28, 2026
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
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.
Laura N.
Astrophysics Research Assistant
Finally an app that actually opens my weird files! Saves me from format frustration daily.
Kyle Brooks
Kyle Brooks
Happy User
This converter delivers exceptionally quick format conversions with reliable results every time.
Brian White
Brian White
Happy User
Security was our top concern when evaluating file conversion tools. reaConverter’s offline mode and role-based access controls let us lock it down for sensitive environments. No unexpected network calls or bloat — just clean, fast conversions. Even passed our pen-testing scans without a hitch.
Marcus White
Marcus White
Healthcare IT
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
Richard E. Miller
Satisfied Customer

FAQ

FITS to JXR Conversion

What are FITS files?

The FITS (Flexible Image Transport System) format is a standard format used particularly for storing, transferring and processing scientific images from fields such as astronomy. FITS was first launched as an open standard in the early 1980s and has gone through several subsequent upgrades. FITS files contain not just images, but also data related to photometry and spatial calibration, and information about the origin of the image. Similar formats include FIT and FTS.

What are JXR files?

JXR or JPEG XR (JPEG Extended Range) is the extension used to define high resolution and high color depth images that provide better quality than regular JPEGs. The JXR format was initially developed as an HD Photo format for Windows' media viewers and editors and can support lossy or lossless compression. Its 48-bit RGB color range allows for accuracy in rendering images and better graphic representation. Additionally, JXRs can include an alpha channel which facilitates the editing of transparent layers.

Can reaConverter convert FITS to JXR?

Yes! reaConverter instantly converts .fits to .jxr 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 FITS 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 JXR online?

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

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

The best way to change FITSs to JXRs 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 JXR.

How can I automate FITS to JXR 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 JXR using the command prompt?

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

What else can I do with reaConverter?

Convert vector filesChange image DPITrace images to vectorSet image bit depthConvert RAW photo formats

Related conversions

Other ways to convert FITS files, and other sources that convert to JXR.

JXR to FITSFITS to JPGFITS to PNGFITS to PDFCPT to JXRCT1 to JXRDCX to JXR
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