Opening an XSI File

The XSI file type is primarily associated with InfoPath.

XSI	File extension: XSI
	File type:	form definition

What is an XSI file

XSI files mostly belong to InfoPath by Microsoft. XSI is a file extension used to save 3D images created using SoftImage, a 3D design software. The data in XSI files include effects, textures, meshes, and shades that render engines may use to either display or animate 3D characters in a 3D scene. InfoPath, a software that was part of Office used XSI extension to store its form definitions. KEA! X, a discontinued PC X server used the XSI file extension to store its starter files.

How can I open an XSI file?

You need a suitable software like InfoPath to open an XSI file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your XSI file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a XSI file directly in the browser:. Just drag the file onto this browser window and drop it.

Online XSI Text Viewer

Choose your .xsi file to analyze

or drag and drop it here

Online File Viewer

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XSI format details:

Each file has a definite file format, that is, how the stored data is arranged in the file. Often, the file format can be deduced from the file extension or the initial bytes (called the signature). Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. Knowledge is power - this also applies when dealing with unknown or faulty files. In the following you will find our evaluation of the XSI files:

The XSI file extension is not common and includes various formats for various programs. However, the following two file formats are common:

• 65% of all XSI files are associated with SoftImage XSI 3D image. These files contain text and words as well as binary data. A typical file size is 540 KB. The file type was created 10 years ago, but is still used today. Several words can almost always be found in the files, e.g. "FRAMES", xsi 0300txt 0032, SI_Scene {, SI_MaterialLibrary { and SI_FileInfo.
• 25% of all XSI files internally utilize the XML file format. The Extensible Markup Language (XML) is a simple text-based format for representing structured information: documents, webpages, data, configuration, books, transactions, invoices, and much more. XML defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. These files are plain text, which means they can be viewed with any text editor such as Windows Editor, Nano for Linux, and TextEdit for macOS. Most of these files are 1 KB to 600 KB in size. Certain words are almost always found in the files, such as encoding, <?xml version="1.0" and UTF-8.

All other XSI files (10%) have no consistent format. You can get all the details of your XSI file by dragging it onto this page or by clicking the button "Choose your .xsi file to analyze" above.