Convert ICNS to FITS

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

Online converters too slow for your ICNS files? reaConverter works locally and handles unlimited batches. All processing runs locally on your PC, so your files stay private and secure.

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.

Install reaConverter

2. Load your ICNS files

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

Drop your ICNS 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 ICNS 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.

ICNS to FITS Converter

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

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Do more with your files

Converting ICNS files for use in a workflow? reaConverter offers many ways to process files, so you can customize them according to your requirements.

Our range of editing options includes auto-processing options such as auto-rotate, auto-crop, watermarking and more. Change Color Space, copy Metadata, set DPI, manage ICC Profile, control Bit Depth.

Conversion features

User Reviews

Average User Rating:
Last updated on January 16, 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

"An excellent program! I use it regularly in my work - it supports nearly every file format imaginable. The interface is intuitive and runs flawlessly every time."

Roger Cook

Happy User

"For agencies handling confidential data, reaConverter eliminates cloud-upload risks while delivering unmatched conversion reliability. Our team uses it both in-office and remotely with identical results."

Jamal Bailey

Satisfied Customer

"Our volunteer team uses reaConverter to prepare images for fundraising campaigns. The learning curve was minimal, and the results are professional-grade. The customer support team even helped us customize a workflow — fantastic service!"

Jason P. Bailey

Non-Profit Coordinator

"We deployed reaConverter across our department to standardize file formats for our archives. The command-line support and automation features integrated perfectly into our systems. Stellar performance and zero crashes—it just works."

David R.

IT Solutions Architect

ICNS to FITS Conversion: FAQ

Can reaConverter convert ICNS to FITS?

Yes! reaConverter instantly converts .icns 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.

Can I convert ICNS to FITS online?

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

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

The best way to change ICNSs 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 ICNS to FITS.

How can I automate ICNS 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 ICNS 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 icns to fits converter for batch processing.

What else can I do with reaConverter?

Set file date Convert RAW formats Convert CAD formats Set picture bit depth Copy EXIF data