ICS Import Checker
Inspect a calendar export before importing it. Find common file structure, event, date and time zone issues without uploading your calendar.
Add a calendar file
Your file stays in your browser. This checker does not send events to a server.
An error is a likely import blocker. A warning needs review and does not always mean the file is invalid.
Import check
The download only normalizes line endings. It cannot repair missing event fields, invalid dates or time zones.
What this checks
Calendar and event boundaries, essential event fields, date shapes, repeated identifiers, named time zones, recurrence rules, file size and line endings. Recurring events and time zone definitions can be complex; this quick check is not a full iCalendar validator. Test important imports with a small copy in your target calendar.