Convert SPL to FITS

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

reaConverter transforms SPL 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 SPL files

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

Select SPLs 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 SPL 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.

SPL to FITS Converter

reaConverter offers the fastest, simplest solution for converting your SPL 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 SPL 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 24, 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

"Your solution was buried deeper in search results than it should be. After struggling with unclear alternatives, I found your guides — finally, instructions that made sense for a first-time user like me. Excellent work!"

Richard E. Miller

Satisfied Customer

SPL to FITS Conversion: FAQ

Can reaConverter convert SPL to FITS?

Yes! reaConverter instantly converts .spl 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 SPL to FITS online?

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

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

The best way to change SPLs 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 SPL to FITS.

How can I automate SPL 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 SPL 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 spl to fits converter for batch processing.

What else can I do with reaConverter?

Change file creation date Convert Gerber images Crop images Convert RAW files Convert GIS files