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.

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FITSAVIF

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.

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Install reaConverter

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.

How FITS and AVIF differ in practice

FITS stores 32-bit greyscale covering the full dynamic range of the scan, and AVIF shows 8 bits. The conversion applies a window level, so what ends up visible depends on the window you choose. Decide separately whether patient metadata should be copied to the output or stripped from it. FITS carries 32 bits per channel and AVIF carries 12, so tonal steps get coarser during conversion. It shows up first in smooth gradients such as skies. If the result will be edited further, move to a 12-bit format only at the very end.

FITS to AVIF Converter

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.

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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.

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User Reviews

Average User Rating:4.8
Last updated on August 08, 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
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FITS to AVIF Conversion: FAQ

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.

What are AVIF files?

AVIF is a new image format launched at the end of 2020. AV1 Image File Format was developed by the Alliance for Open Media in collaboration with Netflix, Google and Cisco. This format was created to be an open-sourced and royalty-free image format with a super-compression efficiency. Multiple graphics compression tests show that the .avif format outperforms the JPEG, PNG and WebP image formats for its image quality to compressed file size ratio.

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 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 online?

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

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 DICOM filesResize pictureConvert vector filesConvert picture color spaceCopy IPTC data

FITS and AVIF: related conversions

Other ways to convert FITS files, and other sources that convert to AVIF.

AVIF to FITSFITS to JPGFITS to PNGFITS to PDFJPG to AVIFDCM to AVIFDCX to AVIF
All FITS conversionsAll AVIF conversions

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