Convert FAX to FITS

FAX to FITS converter that respects your privacy. No cloud uploads, no file size limits — just fast offline batch processing.

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

1. Download and Install reaConverter

reaConverter is a standalone Windows app — download, install, and start converting FAX files in under two minutes. Need edits? Resize, rotate, or add watermarks during conversion.

Install reaConverter

2. Load your FAX files

Add FAX 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.

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.

4. Start FAX to FITS conversion

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

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

FAX to FITS Converter

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

Download Free Trial

Do more with your images

Converting FAX 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 January 25, 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.

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

Satisfied Customer

"An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness."

Elena Anderson

Happy User

"Enable shell integration for lightning-fast file conversions directly from Windows Explorer."

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

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

Happy User

FAX to FITS Conversion: FAQ

Can reaConverter convert FAX to FITS?

Yes! reaConverter instantly converts .fax 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.

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 FAX to FITS online?

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

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

The best way to change FAXs 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 FAX to FITS.

How can I automate FAX 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 FAX 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 fax to fits converter for batch processing.

What else can I do with reaConverter?

Convert GIS files Convert CAD formats Set picture bit depth Convert Gerber images Crop photos