ST4 Converter

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

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reaConverter
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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

Convert ST4 on your PC

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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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

Average User Rating:
Last updated on January 29, 2026
"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
"Tried a few image tools before, but this one is by far the easiest. Drag, drop, convert — done in seconds. It saved me a ton of time when organizing my image folders."
Lisa K.
Lisa K.
Happy User
"This converter delivers exceptionally quick format conversions with reliable results every time."
Brian White
Brian White
Happy User
"Exactly what I needed! Simple, fast, and no bloat. I use reaConverter Lite to resize and convert batches of images for documents. The presets make it super easy, and everything works smoothly."
Mark Jones
Mark Jones
Happy User
"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
"We receive artwork in all kinds of formats from clients. reaConverter takes care of converting them all to print-ready specs automatically using Watch Folders. It reduces errors, saves us time, and has improved our turnaround time with customers. Incredibly powerful software."
Michael D.
Michael D.
Print Shop Owner

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?

Copy EXIF dataConvert DICOM imagesImage resizerConvert PDFAdd text on photos

What formats can I convert a ST4 file to?
ai  apng  avif  bmp  bpg  cal  cg4  cgm  cin  dcm  dcx  dds  dgn  dis  drw  dwf  dwg  dxf  emf  epi  eps  fax  fits  flif  gbr  gif  hpg  hru  ico  iff  iges  igs  jp2  jpeg  jpg  jxl  jxr  mif  mtv  pcl  pct  pcx  pdf  pgm  pic  plt  png  ppm  prc  ps  psd  qoi  qrt  rad  rla  sgi  shp  svg  svgz  tga  tif  tiff  webp  webpll  wmf  wmz  wpg  wrl  xbm  xpm 

Discover more

Explore our efficient ST4 file converter that saves you time and effort by converting multiple .st4 files into different formats.
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