To open ICS file you can either use a calendar application of your choice or if you don't have one you can open ICS file in a text editor and view information inside. Since information in iCalendar file format is stored as plain text it is possible to interpret information inside ICS file without special software.

Is it safe to open a .ics file?

Generally, you can use the following programs to open ICS files: Microsoft Outlook. Mozilla Thunderbird. ... ICS File Converter.

Can .ICS files have viruses?

ICS files can include links to external files (URI option) that could install malware when clicked on. ... When an invitation is passed on, the malware or malicious link is passed on as well – infecting others down the line. As anti-virus programs don't address .