What is an ICS file?
An .ICS file is a standard Calendar File used to share event data. The format is defined by the Internet Engineering Task Force (IETF). It stores calendar details like event title, start time, end time, and description in plain text. Most calendar applications use the .ICS format to send meeting invitations and share calendar subscriptions.
Alternative file formats
While most are calendar files, an .ICS file can also be an IronCAD 3D Scene created by IronCAD, or an IC Recorder Sound File used by Sony devices. Because .ICS has multiple possible meanings, we recommend using viewer.online/ics to identify the actual format of your file.
How to open ICS files?
You can open standard .ICS files with Google Calendar, Microsoft Outlook, or Apple Calendar. If you want to see the underlying text structure, you can open the file with a text editor like Notepad++ or Visual Studio Code.
File inspection and conversion
viewer.online/ics can analyze .ICS files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available. If you need to extract the data for a spreadsheet or document, we recommend file conversion to sensible target formats like .CSV, .PDF, or .TXT on convert.guru.
Summary
viewer.online/ics is useful for identifying, inspecting, and understanding .ICS files without installing software or dealing with compatibility problems.