ICS File - opening and understanding

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

What is an ICS file?

Files that contain the .ics file extension are created by a variety of calendar and scheduling applications. These calendar files allow different users to store calendar information within a text file. That text file can then be stored on the Internet and can be synchronized with other users' calendars. A user can stay updated regarding another user's calendar by "subscribing" to that calendar. This tool often helps administrative assistants help manage their executive's schedules and helps project teams stay coordinated.

Some of the applications that use the .ics file extension include Apple's iCalendar, IBM Lotus Notes and Microsoft's Outlook email and calendar application. The Open Source Bedeworks software project has also been reported to support the ICS file format.

How to open ICS 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 ICS for different purposes.

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

Suggest another file format using extension ICS

While we know of one file format using the .ICS file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .ICS file.

Various viewers for this file format

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

Free File ViewerFree File ViewerUser submitted
Microsoft OutlookMicrosoft OutlookUser submitted
Microsoft OfficeMicrosoft OfficeUser submitted
IBM Lotus Notes/DominoIBM Lotus Notes/DominoUser submitted
IBM Notes/DominoIBM Notes/DominoUser submitted
Stuffit ExpanderStuffit ExpanderUser submitted
VueMinderVueMinderUser submitted
Any Video Converter ProfessionalAny Video Converter ProfessionalUser submitted
ImagineImagineUser submitted
WordPerfect MAILWordPerfect MAILUser submitted
We have not verified any software that we know for certain will work with ICS-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 ICS-files. If you know one, please use the 'Suggest a program' link below and tell us about it!