Preview and warnings will appear here.
Runs 100% in your browser. Your files never leave this device.
How it works
- CSV and XLSX upload with column mapping for title, start, end, location and notes.
- Timezone selection with ambiguous-date warnings and a preview before download.
- Recurrence builder with count or until, validated against calendar rules.
- Reminder offsets via VALARM and strict ICS escaping and line folding.