No. All processing happens directly in your browser using JavaScript. Your CSV data never leaves your device, ensuring complete privacy.

We support formats like YYYY-MM-DD HH:mm, MM/DD/YYYY HH:mm, DD/MM/YYYY HH:mm, and simple date-only for all-day events. You can also choose "Auto-detect" which tries to parse the most common variations automatically.

Select the timezone that matches your source data. The generated ICS file will include the correct timezone definition, so events appear at the right time when imported, regardless of the viewer's timezone.

Absolutely. Google Calendar supports importing .ics files directly via Settings > Import & Export. Outlook, Apple Calendar, and most others have similar import options.

At minimum, you need a column for "Event Title" and "Start Date". All other columns like End Date, Description, and Location are optional. If End Date is missing, the event is treated as a point-in-time or all-day event.