What is ICS File Extension?


ICS is one of the most widely used file extensions for the calendar. They are calendar files stores calendars to maintain the work schedule. The file extension is supported by various email clients including Google Calendar and Apple iCal. The file extension is helpful to publish necessary information from the calendars to the web without any third party tool support.

The ICS stands for Icalendar which falls in the category of exchange files and is widely used by multiple apps such as Google Calendar, Yahoo Calendar etc.

It strategically stores your work schedules by holding information like start time, end time, title and description of the event.

Users can update and cancel an event using the ICS format.

The ICS databases can export to CSV file format.

The default location of ICS is unknown.


It is counted as data exchange file.

Supported Apps

Multiple apps support the ICS file format including

  • Apple Calendar (formerly iCal)
  • Google Calendar
  • Partially by Microsoft Outlook
  • Yahoo! Calendar
  • Evolution (software)
  • IBM Lotus Notes
  • Lightning extension for Mozilla Thunderbird
  • eM Client
  • SeaMonkey


The developer of the extension is Apple Inc.




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How to view ICS File Extension

There are two ways to access ICS.

  • Desktop apps or Google iCalander App
  • Fee or paid tools can help to view ICS files