JBIG2 → FITS · Windows

Convert JBIG2 to FITS

Convert JBIG2 to FITS on your own machine instead of an upload form. reaConverter processes everything locally, with no size limits.

Batch JBIG2 to FITS conversion doesn't have to be complicated. reaConverter processes entire folders with consistent quality settings. Works offline with no internet required, so you can convert anywhere, anytime.

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JBIG2 to FITS
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Converting files since 2001

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How to Convert Multiple JBIG2 Files to FITS?

1. Download and Install reaConverter

reaConverter is a standalone Windows app — download, install, and start converting JBIG2 files in under two minutes.

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Install reaConverter

2. Load your JBIG2 files

Open reaConverter and import your .jbig2 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 JBIG2 files into reaConverter

3. Select FITS as output format

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

Select FITS as output format

4. Start JBIG2 to FITS conversion

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

Start Conversion

Conversion complete? Your FITS 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 JBIG2 files into FITS in seconds - all files processed on your PC for maximum privacy and speed.

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Deep Customization

Do more with your files

Converting JBIG2 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

What people say after the first batch

Average User Rating:4.8
Last updated on August 21, 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
An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness.
Elena Anderson
Elena Anderson
Happy User
Enable shell integration for lightning-fast file conversions directly from Windows Explorer.
R. Lewis
R. Lewis
Happy User
After 200+ conversions on my budget laptop (i3-1115G4/4GB RAM/Win11), reaConverter outperforms heavyweight tools. Zero crashes, low CPU usage during batch processing, and no internet dependency - exactly what professionals need.
Walter Morgan
Walter Morgan
Satisfied Customer
We deployed reaConverter across our department to standardize file formats for our archives. The command-line support and automation features integrated perfectly into our systems. Stellar performance and zero crashes—it just works.
David R.
David R.
IT Solutions Architect

FAQ

JBIG2 to FITS Conversion

What are JBIG2 files?

JBIG2 (.jbig2) is a bi-level image compression standard (ITU-T T.88) optimized for scanned text and documents. It encodes repeated symbols through a shared dictionary and uses arithmetic coding to minimize data size. Supporting both lossless and lossy modes, JBIG2 achieves far higher compression than TIFF G4, especially on text-rich pages. Commonly embedded in PDF and DjVu files, it is ideal for compact monochrome document storage and transmission.

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 JBIG2 to FITS?

Yes! reaConverter instantly converts .jbig2 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 JBIG2 to FITS online?

If you only need to convert a few JBIG2 files to FITS format, feel free to try our free online free online JBIG2 to FITS converter — perfect for small batches with no installation needed!

How can I turn JBIG2 files into FITS on my computer?

The best way to change JBIG2s 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 JBIG2 to FITS.

How can I automate JBIG2 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 JBIG2 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 jbig2 to fits converter for batch processing.

What else can I do with reaConverter?

Convert microscopy filesResize picturesConvert PDFAdd watermark on photoConvert Gerber images

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