Having problems opening a SIS file?

We have programs that can open or convert your SIS files.

Opening SIS files

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

What is a SIS file?

SIS is an acronym for Symbian Installation Source. The SIS file format was developed by Symbian OS 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 an application file. The real application file is the .APP file that the SIS file adds to the device that the APP application is being installed on.

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

Try a universal file viewer

Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.

About File Extension SIS

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the SIS file format or software that uses files with the SIS suffix, please do get in touch - we would love hearing from you.