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ST4 Converter

Fast ST4 conversion for Windows. reaConverter processes large batches reliably, without crashes or timeouts.

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ST4 Files
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How to Convert .st4 Files in Bulk

1. Install reaConverter

Download reliable ST4 conversion software to convert multiple .st4 files and folders in one go.
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Install reaConverter

2. Select ST4 Files

Select ST4s from a folder or drag and drop them into reaConverter, then choose the desired output format.
reaConverter - Load ST4 files

3. Start Conversion

Click Convert to start the bulk conversion of all selected ST4 files. The process will begin right away.
reaConverter - Start ST4 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.

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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.

Conversion features
Image editing

User reviews

From those who tried it

Average User Rating:
Last updated on June 30, 2026
An ultra-fast solution for minimizing file sizes. The entire conversion process takes just 3 minutes!
Logan B.
Logan B.
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
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
Before reaConverter, I was the ‘File Conversion Guy’ at work — a title I never asked for and definitely didn’t want. Then I found the Watch Folders feature, and suddenly I was free! Now, files convert themselves while I sip coffee and pretend I'm still working hard. My coworkers think I'm a wizard. Thanks reaConverter, for saving my sanity and boosting my fake productivity!
Ben H.
Ben H.
Overwhelmed Office Hero
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
reaConverter's automation tools have completely changed how I manage my projects. I often work with large batches of illustrations and used to spend hours converting and organizing them. Now, with Watch Folders, I just set the rules once and everything is handled automatically, exactly how I need it. This is pro-level automation made simple.
Chloe M.
Chloe M.
Freelance Illustrator

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 images 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?
st4 → aist4 → apngst4 → avifst4 → bmpst4 → bpgst4 → calst4 → cg4st4 → cgmst4 → cinst4 → citst4 → dcmst4 → dcxst4 → ddsst4 → dgnst4 → disst4 → drwst4 → dwfst4 → dwgst4 → dxfst4 → emfst4 → epist4 → epsst4 → faxst4 → fitsst4 → flifst4 → gbrst4 → gifst4 → glbst4 → gltfst4 → hpgst4 → hrust4 → icost4 → iffst4 → igesst4 → igsst4 → jp2st4 → jpegst4 → jpgst4 → jxlst4 → jxrst4 → mifst4 → mtvst4 → pclst4 → pctst4 → pcxst4 → pdfst4 → pgmst4 → picst4 → pltst4 → pngst4 → ppmst4 → prcst4 → psst4 → psdst4 → qoist4 → qrtst4 → radst4 → rlast4 → sgist4 → shpst4 → stepst4 → stlst4 → stpst4 → svgst4 → svgzst4 → tgast4 → tifst4 → tiffst4 → u3dst4 → webpst4 → webpllst4 → wmfst4 → wmzst4 → wpgst4 → wrlst4 → x3dst4 → xbmst4 → xpm

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Beyond ST4 conversion

Convert .st4 files in batches of any size, with editing and processing applied along the way. The same tool also handles 700+ other formats, including CAD, medical imaging, and GIS.

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