# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
3 File Associations

.ICS File Extension

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Calendar File Icon
File Type
This file is saved in a plain text format.
Therefore, you can view the contents of the file in a text editor.
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Calendar File
3.6 (35 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryMisc Files
File Format Description

Universal calendar format used by several email and calendar programs, including Microsoft Outlook, Google Calendar, and Apple Calendar; enables users to publish and share calendar information on the Web and over email; often used for sending meeting requests to other users, who can import the events into their own calendars.

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.

Program(s) that open .ICS files
Linux Logo
Mozilla Lightning Icon Mozilla LightningExternal Link
Icon Horde KronolithExternal Link
Claws Mail Icon Claws Mail with vCalendar pluginExternal Link
Updated 8/5/2015

Generic Icon
File TypeIronCAD 3D Drawing File
2.7 (3 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryCAD Files
File Format Description

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.

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.

Program(s) that open .ICS files
Microsoft Windows Logo
IronCAD Icon IronCADExternal Link
Updated 6/23/2008

IC Recorder Sound File Icon
File TypeIC Recorder Sound File
2.0 (2 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryAudio Files
File Format Description

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.

Program(s) that open .ICS files
Updated 2/28/2012