Calendar CSV ↔ ICS Converter
Convert a schedule CSV into a multi-event .ics, and .ics back into CSV, both ways
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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
A two-way converter that turns a CSV containing many events into a single calendar .ics file at once, or unpacks an .ics file back into a tabular CSV. It's useful for bulk-adding events to Google, Apple, or Outlook Calendar, or for backing them up.
How to use
- In the tabs, choose the direction: 'CSV → ICS' or 'ICS → CSV'.
- For CSV, paste or upload a file with title, start, end, location, and description columns.
- Check the conversion result and download it as .ics or .csv.
- Open the generated .ics in your calendar app to add all the events at once.
FAQ
- Are my events sent to a server?
- No. CSV and ICS parsing and conversion all happen only inside your browser, and no event data or files are ever sent to or stored on a server.
- What format should the CSV be?
- The first row must include title and start columns, while end, location, and description are optional. If the start value includes a time like '2026-07-15 14:00' it's treated as a timed event; if it's a date only, it's treated as an all-day event.
- How are time zones handled?
- Events are saved as floating time, using your device's local time as-is. Opening them in a different time zone may show a different time, so treat this as a reference.