100% Secure & Private
SI Converter
SI converter that handles any volume. From a few files to thousands, the results stay consistent.
How to Convert .si Files in Bulk
1. Install reaConverter
2. Select SI Files
3. Start Conversion
Step by step
See It in Action
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.
Extra Tools
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.
User reviews
From those who tried it
Average User Rating:Last updated on July 29, 2026
Questions & Answers
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 files 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 settingsCopy metadata (EXIF, IPTC)Vectorize imagesSet bit depthConvert DICOM files
What formats can I convert a SI file to?
Discover More
Beyond SI conversion
Convert .si 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.
