SI File Extension
Softimage Image Format
- File Type si
- Developer Autodesk
- Popularity
- Application Autodesk Softimage
- Category Graphics Files
- Format Binary
What is a SI file?
The SI extension is related to Softimage Image Format and is classified in the Graphics Files category, which contains 556 files.
The Softimage Image Format (SI) was developed by Autodesk, which created file format and 45 programs to work with them.
SI files are supported by Windows, Mac OS and Linux. To open a SI file, you can choose from 2 programs such as Autodesk Softimage and XnView.
Programs that support SI files
How to open a SI file?
If you cannot open a SI file, it is most often due to missing software. Select a program from the list according to your operating system. Then go to the official website of the program developer, download it, and install it on your device.
Autodesk Softimage and XnView stand out as the preferred programs to manage SI files effectively. To install the current version of Autodesk Softimage, go directly to the official Autodesk website. The universal package for all operating systems is available there.
After successful installation, your operating system should seamlessly handle SI files via Autodesk Softimage.
Set Autodesk Softimage as the default SI program
Change Default Program on Mac
- Right click or Control + left click on the desired SI file;
- Choose "Open in Application" and click "Other";
- Go to the lower section of the window, where you will find the "Enable" menu. By default, it is set to "Recommended Programs";
- Select "All Programs" from this menu and proceed to search for Autodesk Softimage. Check the box next to "Always open in app" to set it as the default option.
Set default programs for Windows
- Start by right-clicking on your SI file, then select the "Open with" option and choose "Choose another app" from the menu that appears;
- In the pop-up window, select the Autodesk Softimage application;
- Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening SI files.
Convert files to and from SI
Be aware that converting a SI file may reduce some features, but you can usually revert it to the original format.
Converting Files to SI Format
Solve problems with SI files
SI files may present some challenges, but most can be easily addressed with minor software tweaks. See the troubleshooting tips below for guidance.
What are the ways to check if my SI file is damaged?
SI graphics files that have become corrupted may display one or more of the following symptoms:
- The file does not respond or shows errors when opening it;
- The file exhibits poor performance during editing operations in Autodesk Softimage;
- The file stops responding or freezes in Autodesk Softimage or other programs;
- Unexplained SI file size inflation;
- Actions performed on the file result in the appearance of error notifications;
Why does Autodesk Softimage crash or shut down frequently?
Insufficient updates for Autodesk products can cause Autodesk Softimage to crash. Be sure to regularly install the latest software updates.
Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.
Is there any specific software or utility that can help repair a damaged SI file?
Use a recovery program to open the damaged SI file, and in the menu, click "Repair" to start the repair operation. Wait for the recovery process to finish, allowing automatic repair of damaged graphics files.
How to edit a SI file?
To make changes to SI files, you need specialized software that allows both opening and editing the graphics files. Online SI editors offer fewer capabilities than applications optimized for Softimage Image Format.
Best SI Editor Software in 2026
With the mentioned criteria in mind, we have assembled a selection of SI editors.
| SI Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| Autodesk Softimage | Autodesk | Windows | 4.3 out of 5 (38 reviews) |