Convert PRI to FITS

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

Manual PRI to FITS conversion wastes hours. reaConverter automates the process — just add files and click Convert. Everything happens offline on your computer — no uploads, no cloud risks.

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PRI to FITS
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How to Convert Multiple PRI Files to FITS?

1. Download and Install reaConverter

Download reaConverter and install it in seconds. The setup is straightforward — no complex configuration, no extra software required.

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Install reaConverter

2. Load your PRI files

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

Drop your PRI files into the window or use File menu to browse and select folders.

Load your PRI files into reaConverter

3. Select FITS as output format

Choose FITS as the target format. Pick a destination folder or let reaConverter save files alongside the originals.

Select FITS as output format

4. Start PRI to FITS conversion

Hit Convert and let reaConverter do the work. The progress window shows status for each file in real time.

Start Conversion

After conversion, find your FITS files in the output folder. Click 'Show converted files' to open it directly.

PRI to FITS Converter

reaConverter offers the fastest, simplest solution for converting your PRI 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 PRI 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
Image editing

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.
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
Joseph Wilson
Satisfied Customer
"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.
David R.
IT Solutions Architect
"So simple! I just needed to convert a couple of files to another format, and for such a straightforward task, the online converter worked perfectly — delivering the files I needed in no time. Excellent service!"
Kenneth D. Carter
Kenneth D. Carter
Satisfied Customer
"I run a small design agency, and reaConverter has saved me countless hours. The batch processing is lightning-fast, and the ability to convert hundreds of files into different formats at once is a game-changer. Highly recommend!"
Mark T.
Mark T.
Satisfied Customer
"The step-by-step video makes conversion foolproof. I'd recommend this to my grandma - it's that well-explained!"
DeShawn M. Thompson
DeShawn M. Thompson
Happy User

PRI to FITS Conversion: FAQ

What are PRI files?

The PRI image format is associated with a currently obsolete image processor called Prisms. Both the software and the extension are considered uncommon, so opening such files is only possible using a limited number of image viewers.

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.

Can reaConverter convert PRI to FITS?

Yes! reaConverter instantly converts .pri 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 PRI to FITS online?

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

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

The best way to change PRIs 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 PRI to FITS.

How can I automate PRI 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 PRI 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 pri to fits converter for batch processing.

What else can I do with reaConverter?

Convert RAW formatsConvert CAD formatsSet picture bit depthSet file dateChange format settings

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