Opening a SIS File

The SIS file type is primarily associated with Steam.

SIS	File extension: SIS
	File type:	game backup

What is a SIS file?

SIS files mostly belong to Steam by Valve. SIS file extension is mainly associated with Software Installation Script (SIS) archives containing application or theme installation packages used by Symbian S60 operating systems for mobile devices. Such SIS files are created with the "makesis" command line tool. Vision 4D, a 3D science imaging and data visualization/annotation software stores image data in SIS files using ImageCore format. SIS image data files typically contain frame dimesions, spatial planes, channel data, color settings, and meta data which may be stored using 8, 16, or 32 bit data depths. The SIS file extension is also associated with game backup files created with Steam, a computer game download/management platform. SIS game backup data typically consists of markup, properties, and configuration for restoring games backups. Sisma, a password manager for Windows stores password and user account information in SIS database files. The stored credentials are encrypted using 256-bit AES encryption.

How to open a SIS file

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

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Programs that open and convert SIS files:

Steam by Valve
See the previous paragraphs to learn more about the main application. SIS files are often referred to as Steam backups because this type of file is primarily created or used by this software.
SANDRA (professional business script) by SiSoftware
SANDRA, short for System Analyser, Diagnostic, and Reporting Assistant is a 32 and 64-bit Windows system analyzer that includes benchmarking, testing and listing modules. It also gives you the ability to compare your machine against other similar products. SANDRA stores professional business scripts in SIS files. This file format is classified as Data.
Sisma (password database) by Digital Confidence
Sisma's is a password manager tool that encrypts and stores different passwords using a 256-bit AES cipher. The passwords are stored in an SIS database file. This file format is classified as Database.
Student Information System (student data) by Pace University
Student Information System is a platform used to add student information to a database for Pace University students. The database entry for each student was stored in an SIS file. This file format is no longer used. This file format is classified as Database.
Symbian (installation package) by Symbian
Symbian is a discontinued smartphone operating system widely used on the so-called S60 smartphones manufactured by various OEMs such as Fujistu, Nokia, and Microsoft, and Samsung. Applications, themes, and malware (executable) installation packages compatible with devices running Symbian operating systems were stored in SIS files. This file format is classified as Executable. Related links: Symbian Foundation, Palm OS Emulator POSE [German site]
Vision 4D (image data) by arvis
Vision4D is a scientific software for modeling, analyzing, and rendering multi-channel 2D, 3D, and 4D images of biological and chemical composition of organisms at a microscopic level. The program stores image data in SIS files. This file format is classified as 3D Image.

SIS file format:

To find out what program is needed to open SIS files, you need to determine the file format. The file format can be deduced from the file extension and the signature. However, different programs can use the same file extension. Furthermore, a file extension can be renamed incorrectly and double-clicking on it will then display an error when it is opened. When there is a problem with a file, the first step to solving it is to determine the file format. Our examination of the SIS files comes to the following conclusion:

The file type with the extension 'SIS' covers different formats for different programs. The two most popular formats are as follows:

35% of all SIS files start with the magic bytes 7A 1A 20 10 00, which are always the first bytes of this file format. They consist of unreadable binary data. Most of these files are 120 KB to 4 MB in size. The file type was developed 10 years ago and is still in use today. A usual file name is WhatsApp_2_11_609.sis. Files like these are about snakes, nokia, fexplorer, unsigned, nanotube, english and signed.
30% of all SIS files store the data in 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. The contents of these files can even be read by a human. SIS files are between 240 bytes and 340 bytes in size. The following keywords are characteristic: CloseAllImages, Mode, ViewingMode, Title and imageserver. A common filename is DigitalSlides.sis.

All other SIS files (35%) have no consistent format, the following 4 formats can be found: sku. Tagged as manager, mobile, call, case or disk. You can get all the details of your SIS file by dragging it onto this page or by clicking the button "Choose your .sis file to analyze" above.

Technical Data for SIS File Extension

File classification:

Backup

Related files:

sisx, sisv, csd, csm, sys, sim, sid, exe, zip, pkg, mp4, jpg, svs, mif, txt, scn, blob, smd, vtx

Mime type:

application/vnd.symbian.install

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: 3rd Party, FileType: SIS File, AppName: Install Software Application

ProgramID: 3rd Party
EXEFile: %ProgramFiles%\Sony Ericsson\Mobile\au3party.exe %1

ProgramID: EPOCInstall.File.2
EXEFile: %ProgramFiles%\Nokia\PC Suite for Nokia 7650\Epocinst.EXE %1

ProgramID: EPOCInstall.File.2
EXEFile: %ProgramFiles%\Nokia\PC Suite for Nokia N-Gage\Epocinst.EXE %1

ProgramID: Nokia.ApplicationInstaller
EXEFile: %ProgramFiles%\Nokia\Nokia PC Suite 6\ApplicationInstaller.exe %1

ProgramID: ZipZag.sis
EXEFile: %ProgramFiles%\ZipZag\zipzag.exe %1

ProgramID: EPOCInstall.File.2
EXEFile: %ProgramFiles%\Nokia\PC Suite for Nokia 6600\Epocinst.EXE %1

ProgramID: Motorola.MotorolaDesktopSuite.SISFILE
EXEFile: %ProgramFiles%\Motorola\Motorola Desktop Suite\AppManager.exe %1

ProgramID: EPOCInstall.File.2
EXEFile: %ProgramFiles%\Nokia\PC Suite for Nokia 9290 Communicator\Epocinst.EXE

ProgramID: SonyEricsson.ApplicationInstaller.1
EXEFile: %ProgramFiles%\Sony Ericsson\Mobile4\3rdPartyInstaller\3rdPartyInstaller.exe

ProgramID: Sandra.Script
EXEFile: %ProgramFiles%\SiSoftware\SiSoftware Sandra Lite XI\sandra.exe /r

ProgramID: Sandra.Script
EXEFile: %ProgramFiles%\SiSoftware Sandra Lite XI.SP1\sandra.exe /r

ProgramID: Sandra.Script
EXEFile: %ProgramFiles%\SiSoftware Sandra Lite XII\sandra.exe /r

ProgramID: Nokia.ApplicationInstaller
EXEFile: %ProgramFiles%\Nokia PC Suite 6\ApplicationInstaller.exe

ProgramID: Sandra.Script
EXEFile: %ProgramFiles%\SiSoftware\SiSoftware Sandra Lite XI.SP1\sandra.exe /r

ProgramID: Sandra.Script
EXEFile: %ProgramFiles%\SiSoftware\SiSoftware Sandra Professional Business XI.SP4\sandra.exe /r

ProgramID: Sandra.Script
EXEFile: %ProgramFiles%\SiSoftware\SiSoftware Sandra Lite XIb\sandra.exe /r

ProgramID: NSeries.ApplicationInstaller
EXEFile: %ProgramFiles%\Nokia\Nseries Application Installer\Application Installer\ApplicationInstaller.exe

ProgramID: NSeries.ApplicationInstaller
EXEFile: %ProgramFiles%\Nokia\NSeries PC Suite\Application Installer\ApplicationInstaller.exe

ProgramID: Nokia.ApplicationInstaller
EXEFile: %ProgramFiles%\Nokia\Nokia PC Suite 7\ApplicationInstaller.exe

ProgramID: Sandra.Script
EXEFile: %ProgramFiles%\SiSoftware\SiSoftware Sandra Professional Business XII.SP1\sandra.exe /r

ProgramID: Sandra.Script
EXEFile: %ProgramFiles%\SiSoftware\SiSoftware Sandra Lite XI.SP1a\sandra.exe /r

ProgramID: Sandra.Script
EXEFile: %ProgramFiles%\SiSoftware\SiSoftware Sandra Professional Business XII\sandra.exe /r

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a sis game backup is a special file format by Valve and should only be edited and saved with the appropriate software.

How to solve problems with SIS files

Associate the SIS file extension with the correct application.
Update your software that should actually open game backups. Because only the current version supports the latest SIS file format. Search, therefore, e.g. on the Valve manufacturer website after an available Steam update.
To make sure that your SIS file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .SIS file online - secure, fast, and no downloads needed.