STX Converter

Stop converting STX files one by one. reaConverter processes entire folders in one run, with the same settings applied throughout.

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STX Files
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How to Convert .stx Files in Bulk

1. Install reaConverter

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

2. Select STX Files

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

3. Start Conversion

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

Convert STX on your PC

For quick and effortless STX 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 STX 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 June 26, 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
"We use reaConverter in our department to handle image and document conversions for multiple teams. The Watch Folders function is brilliant — I configured different folders for different workflows, and now everything happens automatically in the background. No more manual conversions or missed files. Rock-solid performance!"
James L.
James L.
IT Manager
"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
"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
"An efficient all-in-one solution for image conversion and light editing, designed for maximum user-friendliness."
Elena Anderson
Elena Anderson
Happy User
"Security was our top concern when evaluating file conversion tools. reaConverter’s offline mode and role-based access controls let us lock it down for sensitive environments. No unexpected network calls or bloat — just clean, fast conversions. Even passed our pen-testing scans without a hitch."
Marcus White
Marcus White
Healthcare IT

STX files: Frequently Asked Questions

What are STX files?

STX files represent RAW images created with SBIG CCD cameras. They are part of a group of formats known as Santa Barbara Instruments Astronomical Images, also including ST5, ST6, ST7 and ST8. Apart from astronomy, SBIG cameras can also be used in medical imaging, color photometry and a few other scientific and industrial sectors. All formats in the group are considered specialized and rare, so opening STX files might be possible only after conversion to more widely available extensions.

Can reaConverter open STX files?

reaConverter fully supports the STX file format – open, edit, and export STX files to any other popular file format with ease.

How do I change STX to another format?

reaConverter is a user-friendly tool for converting STX files. Once installed on your computer, it allows you to convert all your .stx files at once with just a few clicks. You can even convert stx images directly from Windows Explorer using the right-click menu — fast and convenient.

Can I convert STX online?

If you only want to convert a few STX files, you are welcome to try our free online STX converter.

How can I turn STX files on my computer to another format?

The best way to convert STX 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 STX.

How can I automate STX 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 STX 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 stx converter.

What else can I do with reaConverter?

Change format settingsChange DPIConvert RAW photosSet manual file dateCopy metadata (EXIF, IPTC)

What formats can I convert a STX file to?
ai  apng  avif  bmp  bpg  cal  cg4  cgm  cin  cit  dcm  dcx  dds  dgn  dis  drw  dwf  dwg  dxf  emf  epi  eps  fax  fits  flif  gbr  gif  glb  gltf  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  step  stl  stp  svg  svgz  tga  tif  tiff  u3d  webp  webpll  wmf  wmz  wpg  wrl  x3d  xbm  xpm 

Beyond STX conversion

Convert .stx 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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Free trial · Windows 10/11 · 64-bit · v8.0.244 · Files never leave your computer
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