Convert QOI to FITS

Bulk QOI to FITS conversion with consistent results. Set it up once, process thousands of files with the same quality every time.

Tired of converting QOI files one at a time? reaConverter processes entire folders to FITS automatically. Handles large batches reliably without crashes or timeouts.

1. Download and Install reaConverter

reaConverter is a standalone Windows app — download, install, and start converting QOI files in under two minutes. You can also resize, crop, and adjust images during conversion.

Install reaConverter

2. Load your QOI files

Launch reaConverter and drop in your QOI files. The software queues everything for batch processing with consistent settings.

Add files by dragging them in, browsing folders, or using the right-click menu from Windows Explorer.

3. Select FITS as output format

Pick FITS as output format and choose the destination folder where you want to save new .fits files.

4. Start QOI to FITS conversion

Then simply press the Convert button and your conversion will begin in no time!

Once the conversion is complete, you can find your FITS files in the destination folder you selected.

QOI to FITS Converter

reaConverter offers the fastest, simplest solution for converting your QOI 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 QOI 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

"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

"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

"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

"This software just works! My old laptop can’t handle Photoshop, but reaConverter flies through conversions without breaking a sweat. Wi-Fi gone? Still strong!"

Robert Williams

Happy User

QOI to FITS Conversion: FAQ

Can reaConverter convert QOI to FITS?

Yes! reaConverter instantly converts .qoi 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 QOI to FITS online?

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

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

The best way to change QOIs 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 QOI to FITS.

How can I automate QOI 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 QOI 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 qoi to fits converter for batch processing.

What else can I do with reaConverter?

Convert GIS files Change format settings Change DPI Convert CAD formats Set bit depth