Convert C4 to FITS

C4 to FITS made simple. Add files or folders, pick your settings, click Convert. reaConverter handles the rest — even thousands of files.

reaConverter transforms C4 files to FITS quickly and reliably. Drag in folders, set your options, click Convert, done. No cloud accounts, no file uploads, no complicated setup. Just install and start converting.

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 C4 files

Load your C4 files into reaConverter. You can add individual files or point to folders, and the software will queue everything automatically.

Select C4s from a folder or drag-and-drop them directly into the reaConverter window.

3. Select FITS as output format

Choose FITS for output and set your save location. reaConverter lets you customize quality and apply edits before conversion.

4. Start C4 to FITS conversion

Press the Convert button and reaConverter takes care of the rest. Processing time depends on file size and volume.

After processing, find all your new .fits files in the output location. The log shows details for each conversion.

C4 to FITS Converter

reaConverter offers the fastest, simplest solution for converting your C4 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 C4 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 14, 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

"Creating marketing materials for various platforms requires multiple file versions from single sources. reaConverter's workflow automation lets us generate PNG, JPEG, and SVG variants from AI and PSD files simultaneously. The color profile management ensures brand consistency across all outputs, and the processing speed allows for last-minute changes without delaying deadlines."

Rebecca Turner

Marketing Agency CEO

"I was drowning in mismatched file formats until I found reaConverter. The one-click conversion and editing tools simplified everything, and the pricing is reasonable for small businesses. Now I spend less time troubleshooting and more time growing my brand!"

Emily K.

E-commerce Entrepreneur

"This program is incredibly simple and user-friendly, even beginners can use it with ease. It supports batch processing, works offline, and runs smoothly on my aging Acer Aspire laptop. Best of all, the output quality is outstanding!"

Kevin Harris

Happy User

"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

C4 to FITS Conversion: FAQ

Can reaConverter convert C4 to FITS?

Yes! reaConverter instantly converts .c4 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 C4 to FITS online?

If you only need to convert a few C4 files to FITS format, feel free to try our free online free online C4 to FITS converter — perfect for small batches with no installation needed!

How can I turn C4 files into FITS on my computer?

The best way to change C4s 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 C4 to FITS.

How can I automate C4 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 C4 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 c4 to fits converter for batch processing.

What else can I do with reaConverter?

Convert PDF Watermark photos Convert RAW files Convert GIS files Change file creation date