Home : File Types : ICS File (3 File Associations)

.ICS File Extension

File Type 1Calendar File

3.5 (50 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryMisc Files


This file is saved in a plain text format. You can open and view the contents of this file using a text editor.

What is a ICS file?

An ICS file is a calendar file saved in a universal calendar format used by several email and calendar programs, including Microsoft Outlook, Google Calendar, and Apple Calendar. It enables users to publish and share calendar information on the web and over email. ICS files are often used for sending meeting requests to other users, who can import the events into their own calendars.

More Information

Calendar files are saved in a plain text format. They contain information such as the title, summary, start time, and end time for the calendar event. The Calendar format also supports event updates and cancellations.

You can quickly convert your ICS file to other popular file formats, such as .CSV, .PDF, .XLSX, and .HTML, with the ICS File Converter web program.

NOTE: Apple Calendar was formerly known as Apple iCal but was changed in 2012 with the release of OS X Mountain Lion.

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Programs that open ICS files
Microsoft Outlook 2016
Mozilla Lightning
Apple Calendar
Mozilla Lightning
Mozilla Lightning
Horde Kronolith
Claws Mail
with vCalendar plugin
Google Calendar
ICS File Converter
Updated 8/24/2016

File Type 2IC Recorder Sound File

2.8 (5 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryAudio Files


This file is saved in a binary format, which requires a specific program to read its contents.

.ICS File Association 2

Audio file created by a Sony IC recorder (e.g., the Sony ICD-R100), a handheld device used for recording personal messages; commonly used for storing voice audio, which is useful for forensics and legal environments, as well as for general personal memos.

Programs that open ICS files
Sony Digital Voice Player
Sony Digital Voice Editor
Microsoft Windows Media Player with Sony Player Plug-in
Updated 2/28/2012

File Type 3IronCAD 3D Drawing File

2.3 (4 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryCAD Files


File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

.ICS File Association 3

Three-dimensional model or scene created with IronCAD, a 3D CAD program; may contain one or more 3D objects with colors, textures, lighting effects, and animation data.

More Information

NOTE: ICS files may automatically open in a calendar program such as MS Outlook due to the iCalendar file association. To open ICS files in IronCAD, you may need to right-click the file, select "Open With..." and choose IronCAD as the program.

Programs that open ICS files
Updated 6/23/2008

.ICS Extension Information

This page contains information about the file extension ICS and its known file associations. Our goal is to help you understand what a *.ics file is and how to open it.

All file types, file format descriptions, and programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and do not publish any information we have not verified.

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