100% Secure & Private
ST4 Converter
Fast ST4 conversion for Windows. reaConverter processes large batches reliably, without crashes or timeouts.
How to Convert .st4 Files in Bulk
1. Install reaConverter
2. Select ST4 Files
3. Start Conversion
Step by step
See It in Action
For quick and effortless ST4 file handling on your PC, reaConverter offers powerful conversion tools with batch processing. Best of all, it works entirely offline — ensuring your sensitive data never leaves your computer.
Extra Tools
Do more with your files
Converting ST4 files for use in a larger project? 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.
User reviews
From those who tried it
Average User Rating:Last updated on July 31, 2026
Questions & Answers
ST4 files: Frequently Asked Questions
What are ST4 files?
An ST4 file represents a RAW image taken with an SBIG CCD camera. SBIG is a producer of astronomical instruments and ST4s most likely contain images related to some type of scientific or industrial application. They are considered rare and are probably difficult to open using regular image viewers.
Can reaConverter open ST4 files?
reaConverter fully supports the ST4 file format – open, edit, and export ST4 files to any other popular file format with ease.
How do I change ST4 to another format?
reaConverter is a user-friendly tool for converting ST4 files. Once installed on your computer, it allows you to convert all your .st4 files at once with just a few clicks. You can even convert ST4 files directly from Windows Explorer using the right-click menu — fast and convenient.
Can I convert ST4 online?
If you only want to convert a few ST4 files, you are welcome to try our free online ST4 converter.
How can I turn ST4 files on my computer to another format?
The best way to convert ST4 files on your PC is to get 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 ST4.
How can I automate ST4 files conversion?
reaConverter supports all the essential automation features, such as right-click сonversion and Watch Folders, for the most efficient automated file conversion in any software of its kind.
Can I convert ST4 files using scripts or the command-line interface?
reaConverter provides full access to all its features from the Windows command-line shell, including the command-line st4 converter.
What else can I do with reaConverter?
Convert GIS filesConvert Gerber imagesChange image color spaceConvert DICOM imagesCrop pictures
What formats can I convert a ST4 file to?
Discover More
Beyond ST4 conversion
Convert .st4 files in batches of any size, with editing and processing applied along the way. The same tool also handles 800+ other formats, including CAD, medical imaging, and GIS.
