Convert GTIFF to FITS

Why upload sensitive GTIFF files to online converters? reaConverter processes everything locally — convert to FITS with zero cloud risk.

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

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GTIFF to FITS
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GTIFFFITS

How to Convert Multiple GTIFF 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 GTIFF files

Add GTIFF files to reaConverter. One file or a thousand, the process is the same. Everything runs locally on your machine.

You can drag-and-drop files, browse to a folder, or add entire directory trees including subfolders.

Load your GTIFF files into reaConverter

3. Select FITS as output format

Select FITS from the output format list and set your destination folder. You can also adjust quality and compression settings.

Select FITS as output format

4. Start GTIFF to FITS conversion

Click the Convert button to start. reaConverter will process all your files with the settings you selected.

Start Conversion

When finished, your new .fits files will be waiting in the destination folder.

GTIFF to FITS Converter

reaConverter offers the fastest, simplest solution for converting your GTIFF 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 GTIFF 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 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.
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
"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
Richard E. Miller
Satisfied Customer
"Converts files in seconds! Finally a tool that's both fast and simple to use."
Wei Chen
Wei Chen
Happy User
"I'd been searching for reliable conversion software forever — reaConverter has everything I need! After installing and watching the tutorial, I had my files converted to the perfect format in minutes. Flawless experience!"
Sanjay Mehta
Sanjay Mehta
Satisfied Customer
"An ultra-fast solution for minimizing file sizes. The entire conversion process takes just 3 minutes!"
Logan B.
Logan B.
Satisfied Customer

GTIFF to FITS Conversion: FAQ

What are GTIFF files?

GeoTIFF (.gtiff) is a georeferenced image format used for storing raster graphics with embedded geographic metadata. Common in GIS and remote sensing, it allows precise alignment with map coordinates, making it ideal for satellite imagery, terrain models, and aerial photography. GeoTIFF files are widely supported by mapping software and can be converted or edited without losing their spatial reference.

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 GTIFF to FITS?

Yes! reaConverter instantly converts .gtiff 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 GTIFF to FITS online?

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

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

The best way to change GTIFFs 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 GTIFF to FITS.

How can I automate GTIFF 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 GTIFF 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 gtiff to fits converter for batch processing.

What else can I do with reaConverter?

Convert Gerber imagesCrop imagesConvert DICOM imagesResize photosConvert GIS files

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