SIS File - opening and understanding

Did your computer fail to open a SIS file? We explain what they are used for and recommend software that we know can open or otherwise handle your .SIS files.

What is a SIS file?

A .SIS file is a Symbian Installation Source file. SIS is an acronym for Symbian Installation Source. Symbian OS developed the SIS file format for use on mobile devices such as PDA's and Cellphones.

Contrary to popular belief, files with the .sis extension are installation files and not application files. The real application file is the .APP file that the SIS file adds to the device that the application is being installed on.

The SIS files are created with the Symbian's "makesis" command-line tool included with the CreateSIS development program. Program developers will often use the CreateSIS program when creating applications for the Symbian operating system.

How to open SIS files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension SIS for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 10 different SIS openers which you will find listed below.

Other file formats using extension .SIS

While Symbian Installation Source is a popular type of SIS-file, we know of 2 different uses of the .SIS extension.

The SIS file extension indicates to your device which app can open the file. However, different apps may use the same file extension for different types of data. So a SIS opener may not be able to open all kinds of SIS files. In this case, look through both formats to make sure you find the best suited SIS viewer.

EPOC Installation package

Through our analysis of SIS files, we know that one use of the format is EPOC Installation package. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

While we have not verified the apps ourselves yet, our users have suggested 10 different SIS openers which you will find listed below.

Various viewers for this file format

These apps are known to open certain types of SIS files. Remember, different programs may use SIS files for different purposes, so you may need to try out a few of them to be able to open your specific file.

WinRARWinRARUser submitted
Free File ViewerFree File ViewerUser submitted
SiSoftware Sandra LiteSiSoftware Sandra LiteUser submitted
ImageScopeImageScopeUser submitted
Nokia SuiteNokia SuiteUser submitted
EPOC Install ApplicationEPOC Install ApplicationUser submitted
RealPlayerRealPlayerUser submitted
SiSoftware Sandra Professional BusinessSiSoftware Sandra Professional BusinessUser submitted
OperaOperaUser submitted
Microsoft Windows Media PlayerMicrosoft Windows Media PlayerUser submitted
We have not verified any software that we know for certain will work with SIS-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with SIS-files. If you know one, please use the 'Suggest a program' link below and tell us about it!