FITS → AVIF · Windows

Convert FITS to AVIF

Stop converting FITS files one by one. reaConverter processes entire folders to AVIF automatically. Add files, pick settings, click Convert.

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

.fits.AVIF
4.8

Converting files since 2001

Runs offline — nothing uploaded

Read what our users say →

How to Convert Multiple .fits Images to .avif?

1. Download and Install reaConverter

reaConverter installs quickly on any Windows PC. No dependencies, no bloatware — just a clean setup that's ready to use immediately. reaConverter also includes editing tools: resize, crop, rotate, and more.

2. Load your FITS files

Launch reaConverter and drop in your FITS 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.

Load your FITS files into reaConverter

3. Select AVIF as output format

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

Select AVIF as output format

4. Start FITS to AVIF conversion

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

Start Conversion

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

Step by step

How It Works

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

Technical note

How FITS and AVIF differ in practice

A scientific camera records 32 bits per pixel, and the signal of interest often occupies a narrow slice of that range, while AVIF shows 8. Conversion applies a display mapping, so two acquisitions that look identical afterwards can hold very different underlying intensities. Treat the AVIF output as something to look at and publish rather than something to measure. FITS stores pixels without compression loss and AVIF does not, so this is a one-way step. Choose a high quality setting, and avoid converting the same file back and forth, because each pass compounds the artefacts.

Power Features

Do more with your images

Converting FITS 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

User reviews

What people say after the first batch

Average User Rating:4.8
Last updated on September 28, 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
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.
Laura N.
Astrophysics Research Assistant
An ultra-fast solution for minimizing file sizes. The entire conversion process takes just 3 minutes!
Logan B.
Logan B.
Satisfied Customer
I use the online converter — it’s quick and hassle-free!
Jian Wong
Jian Wong
Happy Online User
Working in a print studio means constantly juggling obscure file formats. I used to waste hours Googling converters or installing random software — until reaConverter became my Swiss Army knife. Install it once, and you're set forever. No internet? No problem!
Helen Evans
Helen Evans
Satisfied Customer
Finally an app that actually opens my weird files! Saves me from format frustration daily.
Kyle Brooks
Kyle Brooks
Happy User

FAQ

FITS to AVIF Conversion

Can reaConverter convert FITS to AVIF?

Yes! reaConverter instantly converts .fits to .avif 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 FITS 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 FITS to AVIF in my browser?

Yes — with our free web-based FITS to AVIF converter, you can convert .fits files instantly, right in your browser. No installation, no uploads — perfect for quick, local conversions.

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

The best way to change FITSs to AVIFs 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 FITS to AVIF.

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

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

What else can I do with reaConverter?

Convert Gerber filesConvert picture color spaceConvert vector filesChange image DPIConvert GIS files

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