Convert STI to FITS

If you're looking for a reliable and efficient software tool to convert your STI files to FITS format with ease, you can count on reaConverter.

reaConverter offers offline file conversion between numerous formats, including STI to FITS, plus additional image editing tools for enhanced file preparation.

Download
reaConverter
Convert
STI to FITS
Online
STIFITS

How to Convert Multiple STI Images to FITS?

1. Download and Install reaConverter

reaConverter is quick to download, install and launch. This standalone software is extremely efficient in managing a wide range of batch conversions. At the same time, it will allow you to apply image editing options during conversion.

reaConverter logo
Install reaConverter

2. Load your STI files

Start reaConverter and load all the .sti files you intend to convert into .fits. The software supports multiple STI conversion and processes all files locally on your computer.

Select STIs from a folder or by drag-and-dropping them directly into the reaConverter window.

Load your STI files into reaConverter

3. Select FITS as output format

Pick the FITS as output format and choose the destination folder where you want to save new .fits files.

Select FITS as output format

4. Start STI to FITS conversion

Then simply press Convert button and your conversion will begin in no time!

Screenshot

Once the conversion is complete, you can find your FITS files in the destination folder you selected.

STI to FITS Converter

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

Download Free Trial

Do more with your images

Converting STI 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
Image editing

User Reviews

Average User Rating:
Last updated on May 24, 2025
"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
"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
"This software just works! My old laptop can’t handle Photoshop, but reaConverter flies through conversions without breaking a sweat. Wi-Fi gone? Still strong!"
⭐⭐⭐⭐⭐
Robert Williams
Happy User
"Rare software that actually does it all! Converts anything, beautiful interface, and never lets me down. A must-have!"
⭐⭐⭐⭐⭐
Henry R.
Happy User
"For cross-platform compatibility, JPEG remains the gold standard. reaConverter’s precision conversions ensure perfect results every time, whether for presentations, websites, or client deliverables."
⭐⭐⭐⭐⭐
Paul Baker
Happy User
"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

STI to FITS Conversion: FAQ

What are STI files?

STI is a format associated with shooting in RAW mode with Sinar cameras, and has a similar function to the CS1 format. Well-known among photography aficionados, the Sinar brand was founded in the 1940s in Switzerland and has ever since produced several models of large and medium sized cameras. Most of these cameras are conceived as integrated systems and include parts that can be changed between different models. Shooting STI images with a Sinar camera results in creating RAW images that can be processed with a specialized editing software so as to create high quality images, which are more suitable for print than other compressed formats, such as JPEG.

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 STI to FITS?

Yes! reaConverter instantly converts .sti 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 STI to FITS online?

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

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

The best way to change STIs 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 STI to FITS.

How can I automate STI 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 STI 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 sti to fits converter for batch processing.

What else can I do with reaConverter?

Change format settingsChange DPISet manual file dateConvert PDF filesWatermark picture

Find out more

Get advanced software for file conversion, processing, and editing, giving you complete, precise control over your work.
Download
reaConverter
Buy Now
reaConverter software