SI Converter

SI converter that handles any volume. From a few files to thousands, the results stay consistent.

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reaConverter
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SI Files
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How to Convert .si Files in Bulk

1. Install reaConverter

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

2. Select SI Files

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

3. Start Conversion

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

Convert SI on your PC

For quick and effortless SI 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 SI 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 July 01, 2026
"My photography business relies on fast, accurate processing of images. With reaConverter’s Watch Folder, I drop my RAW photos into a folder and they’re instantly converted to high-res JPEGs with custom naming and watermarking. It’s streamlined my post-processing more than I imagined possible."
Emily R.
Emily R.
Photographer
"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
"This program is incredibly simple and user-friendly, even beginners can use it with ease. It supports batch processing, works offline, and runs smoothly on my aging Acer Aspire laptop. Best of all, the output quality is outstanding!"
Kevin Harris
Kevin Harris
Happy User
"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
"This converter delivers exceptionally quick format conversions with reliable results every time."
Brian White
Brian White
Happy User
"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

SI files: Frequently Asked Questions

What are SI files?

The SI format is associated with Softimage, a program first released in 1988 for Silicon Graphics workstations. The software specialized in creating 3D animation for the film, broadcasting, gaming and advertising industries, and by 2000 it was replaced by an upgraded version called Softimage XSI. SI images are currently considered rare and obsolete.

Can reaConverter open SI files?

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

How do I change SI to another format?

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

Can I convert SI online?

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

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

The best way to convert SI 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 SI.

How can I automate SI 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 SI 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 si converter.

What else can I do with reaConverter?

Change format settingsChange DPIConvert Gerber filesCrop imageConvert PDF files

What formats can I convert a SI 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 SI conversion

Convert .si 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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reaConverter
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Free trial · Windows 10/11 · 64-bit · v8.0.242 · Files never leave your computer
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