Convert HDR to FITS

Fast HDR to FITS conversion for Windows. reaConverter supports 700+ formats with batch processing and built-in editing tools.

Got a folder full of HDR files? reaConverter batch converts them to FITS in minutes, not hours. Local processing means instant results, even with thousands of files.

1. Download and Install reaConverter

reaConverter installs quickly on any Windows PC. No dependencies, no bloatware — just a clean setup that's ready to use immediately. reaConverter also includes editing tools: resize, crop, rotate, and more.

Install reaConverter

2. Load your HDR files

Add your HDR files to reaConverter. Whether it's a handful or an entire archive, the batch engine processes them efficiently.

Browse for files, drag them in, or add entire folders at once. reaConverter queues everything automatically.

3. Select FITS as output format

Pick FITS as the output format. Set the destination folder and optionally configure resolution, quality, or file naming.

4. Start HDR to FITS conversion

Start the conversion with one click. reaConverter handles everything and notifies you when it's done.

When the batch finishes, your FITS files are ready in the destination folder you chose earlier.

HDR to FITS Converter

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

Download Free Trial

Do more with your images

Converting HDR 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

"An ultra-fast solution for minimizing file sizes. The entire conversion process takes just 3 minutes!"

Logan B.

Satisfied Customer

"I use the online converter — it’s quick and hassle-free!"

Jian Wong

Happy Online User

"Working in a print studio means constantly juggling obscure file formats. I used to waste hours Googling converters or installing random software — until reaConverter became my Swiss Army knife. Install it once, and you're set forever. No internet? No problem!"

Helen Evans

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.

IT Solutions Architect

HDR to FITS Conversion: FAQ

Can reaConverter convert HDR to FITS?

Yes! reaConverter instantly converts .hdr 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.

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 HDR to FITS online?

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

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

The best way to change HDRs 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 HDR to FITS.

How can I automate HDR 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 HDR 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 hdr to fits converter for batch processing.

What else can I do with reaConverter?

Convert DICOM images Resize picture Convert RAW formats Convert CAD formats Change image bit depth