Opening a SII File

The SII file type is primarily associated with Euro Truck Simulator 2.

SII	File extension: SII
	File type:	game data

What is a SII file?

SII files mostly belong to Euro Truck Simulator 2 by SCS. An SII file contains various data used by SCS video games such as Euro Truck Simulator 2, American Truck Simulator, and 18 Wheels of Steel: Haulin'. Truck properties, game controls, backups, streaming parameters, game saves, modifications packages, and settings for these games are saved in different SII files. The contents of an SII file is saved as text or binary data depending on the use case.

How to open a SII file

You need a suitable software like Euro Truck Simulator 2 from SCS to open a SII 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 SII file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a SII file directly in the browser:. Just drag the file onto this browser window and drop it.

Online SII Text Viewer

Choose your .sii file to analyze

or drag and drop it here

Online File Viewer

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SII format details:

Every file has a defined file format, i.e. how the data is arranged in the file. A file format is determined by the file extension and signature, so JPEG images have the extension .jpg and the first bytes in the file are ÿØÿ. Nonetheless, different programs can utilize the same file extension to represent distinct file formats. Double-clicking on the file often results in an error when opening. So you need a detailed analysis of a file to find out the format and the associated program. Our analysis of the SII files produces the following result:

The SII file extension includes different formats for different programs. The file formats most commonly found in SII files are:

• 50% of all SII files start with the magic bytes ScsC, which are always the first bytes of this file format. The contents of these files cannot be read by a human; only a computer program can interpret the data. SII files can be up to 580 KB in size, but are often around 1 KB - 220 KB. The file type is relatively new. The keywords ScsC are typical for these files. The file name game.sii or profile.sii is characteristic of these files. Files like these are about info.
• 35% of all SII files use the same file format, which have the signature SiiNunit. These files are text files and can therefore be read using a text editor. The average file size is 570 bytes with most files being between 75 bytes and 17 KB in size. Several words can almost always be found in the files, e.g. SiiNunit, data and _nameless. A common filename is live_streams.sii or manifest.sii. Files like these are sometimes connected to streams, live, controls, data, gearbox, global and mods.

The remaining 15% of all SII files are different files with different signatures, such as BSII. These files sometimes refer to volvo. If you want to find out which format your SII file belongs to, just click on the button "Choose your .sii file to analyze".