Convert FITS to ICO

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

Looking to change FITS files to ICO format? reaConverter makes it simple — add your files, select output format, and convert entire folders in one click. Runs entirely on your hardware for maximum speed — no waiting for uploads or server queues.

1. Download and Install reaConverter

reaConverter is a standalone Windows app — download, install, and start converting FITS files in under two minutes. Built-in editing tools let you resize, crop, or watermark as you convert.

Install reaConverter

2. Load your FITS files

Start reaConverter and add your .fits files. The software processes everything locally, so your files never leave your computer.

Use drag-and-drop, folder browser, or right-click conversion from Explorer.

3. Select ICO as output format

Select ICO from 700+ supported output formats. Choose your destination folder and adjust settings to match your needs.

4. Start FITS to ICO conversion

Click Convert to start the batch. reaConverter processes files quickly and shows you the status of each one.

Once done, reaConverter shows a summary. Click 'Show converted files' to jump straight to your ICO output.

FITS to ICO Converter

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

Download Free Trial

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 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

"Finally an app that actually opens my weird files! Saves me from format frustration daily."

Kyle Brooks

Happy User

"This converter delivers exceptionally quick format conversions with reliable results every time."

Brian White

Happy User

"Security was our top concern when evaluating file conversion tools. reaConverter’s offline mode and role-based access controls let us lock it down for sensitive environments. No unexpected network calls or bloat — just clean, fast conversions. Even passed our pen-testing scans without a hitch."

Marcus White

Healthcare IT

"5/5⭐ Finally! Does what it promises - converts AND tweaks images without complicated menus. Perfect for quick jobs."

J. Mitchell

Satisfied Customer

FITS to ICO Conversion: FAQ

Can reaConverter convert FITS to ICO?

Yes! reaConverter instantly converts .fits to .ico 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 ICO online?

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

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

The best way to change FITSs to ICOs 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 ICO.

How can I automate FITS to ICO 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 ICO using the command prompt?

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

What else can I do with reaConverter?

Convert vector images Convert picture color space Copy IPTC data Convert PDF Watermark photo