Convert JBG to FITS

Tired of slow online converters? reaConverter transforms JBG to FITS instantly — right on your desktop, no upload needed.

Online converters too slow for your JBG files? reaConverter works locally and handles unlimited batches. All processing runs locally on your PC, so your files stay private and secure.

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JBG to FITS
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How to Convert Multiple JBG Files to FITS?

1. Download and Install reaConverter

First, grab reaConverter from the download button below. Installation is fast, and the software runs offline — no account or signup needed.

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Install reaConverter

2. Load your JBG files

Add JBG files to reaConverter. One file or a thousand, the process is the same. Everything runs locally on your machine.

You can drag-and-drop files, browse to a folder, or add entire directory trees including subfolders.

Load your JBG files into reaConverter

3. Select FITS as output format

Select FITS from the output format list and set your destination folder. You can also adjust quality and compression settings.

Select FITS as output format

4. Start JBG to FITS conversion

Click the Convert button to start. reaConverter will process all your files with the settings you selected.

Start Conversion

When finished, your new .fits files will be waiting in the destination folder.

JBG to FITS Converter

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

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Do more with your files

Converting JBG 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
Image editing

User Reviews

Average User Rating:
Last updated on January 20, 2026
"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
"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
"The step-by-step video makes conversion foolproof. I'd recommend this to my grandma - it's that well-explained!"
DeShawn M. Thompson
DeShawn M. Thompson
Happy User
"I'm really impressed with this software - it converts files between formats incredibly fast!"
Lin Zhang
Lin Zhang
Happy User
"I firmly believe working with JPEG — the universal format supported by all devices and apps—is the wisest choice. reaConverter handles these conversions flawlessly."
Ava Thomas
Ava Thomas
Happy User
"An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness."
Elena Anderson
Elena Anderson
Happy User

JBG to FITS Conversion: FAQ

What are JBG files?

JBG or JBIG is a lossless image format storing black-and-white (bi-tonal) and colour images. It was developed by the Joint Bi-level Image Experts Group and it provides 1-bit raster images, with smaller file size when compared to other similar formats. JBG is mostly used as a standard format for compressing fax machine documents.

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.

Can reaConverter convert JBG to FITS?

Yes! reaConverter instantly converts .jbg to .fits 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 JBG to FITS online?

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

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

The best way to change JBGs to FITSs 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 JBG to FITS.

How can I automate JBG to FITS 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 JBG files to FITS using the command prompt?

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

What else can I do with reaConverter?

Convert CAD formatsSet picture bit depthConvert GIS filesSet file dateConvert DICOM images

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