Convert EXR to FITS

Stop converting EXR files one by one. reaConverter processes entire folders to FITS automatically — just drag, drop, and click Convert.

Manual EXR to FITS conversion wastes hours. reaConverter automates the process — just add files and click Convert. Everything happens offline on your computer — no uploads, no cloud risks.

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. Built-in editing tools let you resize, crop, or watermark as you convert.

Install reaConverter

2. Load your EXR files

Open reaConverter and add your EXR files. You can load individual files, entire folders, or even nested subfolders.

Drop your EXR files into the window or use File menu to browse and select folders.

3. Select FITS as output format

Choose FITS as the target format. Pick a destination folder or let reaConverter save files alongside the originals.

4. Start EXR to FITS conversion

Hit Convert and let reaConverter do the work. The progress window shows status for each file in real time.

After conversion, find your FITS files in the output folder. Click 'Show converted files' to open it directly.

EXR to FITS Converter

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

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Do more with your images

Converting EXR 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 19, 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

"Creating marketing materials for various platforms requires multiple file versions from single sources. reaConverter's workflow automation lets us generate PNG, JPEG, and SVG variants from AI and PSD files simultaneously. The color profile management ensures brand consistency across all outputs, and the processing speed allows for last-minute changes without delaying deadlines."

Rebecca Turner

Marketing Agency CEO

"I was drowning in mismatched file formats until I found reaConverter. The one-click conversion and editing tools simplified everything, and the pricing is reasonable for small businesses. Now I spend less time troubleshooting and more time growing my brand!"

Emily K.

E-commerce Entrepreneur

"This program is incredibly simple and user-friendly, even beginners can use it with ease. It supports batch processing, works offline, and runs smoothly on my aging Acer Aspire laptop. Best of all, the output quality is outstanding!"

Kevin Harris

Happy User

"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

EXR to FITS Conversion: FAQ

Can reaConverter convert EXR to FITS?

Yes! reaConverter instantly converts .exr 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 EXR to FITS online?

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

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

The best way to change EXRs 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 EXR to FITS.

How can I automate EXR 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 EXR 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 exr to fits converter for batch processing.

What else can I do with reaConverter?

Convert PDF Watermark photos Convert Gerber images Crop photo Convert DICOM images