If you need to manually convert ICS to CSV format, the first step is to open the ICS calendar file in a calendar application, such as Microsoft Outlook or Google Calendar. Once the ICS calendar file is ready in the application, use the export features that come standard with the application (you can find the export options under "File > Export" in Outlook, and "download" in Google Calendar, and simply use the CSV format) to obtain the calendar data conveniently. From there, the calendar data has been converted to a spreadsheet-friendly format.

Nevertheless, carrying out the conversion process manually has its disadvantages. You will need a calendar application that explicitly allows exporting calendar data, the process takes time, and the process may deprive the ICS file of content if it is at all complicated. All reminders, attachments, or custom fields in a calendar event may not completely transfer to the calendar exported to CSV format.

If manual methods seem tedious and slow, use the MacSoik ICS Converter Tool. This tool can change your ICS files to CSV, a PDF, EML, XLSX, TXT, PNG, or other formats. It will keep your data intact and can convert your iCalendars, regardless of size, in bulk. Plus, it does not require technical expertise and works on all Windows OS versions. The tool has other functions as well:

• Exports ICS files to several web and cloud-based clients, all without losing any data.
• Converts an ICS File to Word after data is filtered and duplicates removed.
• Converts 10 folders of ICS files for free in the demo version.

Steps to Convert ICS file to CSV

1. Run the MacSonik ICS File Converter Tool and select the add ICS option.
2. Find the ICS file on your computer you want to convert and select Open to add then click next.
3. Next, preview the contents in your ICS file and select folders to convert and click next.
4. Next, from the File Format drop menu select the CSV option supposed to be in the drop menu.
5. Next, select any additional filters that are relevant and then select add Destination Path.
6. Finally, select the Convert button to make any of the changes you requested.

Know More: https://www.macsonik.com/blog/convert-ics-to-csv/