ICS is iCalendar — the format every calendar app exports: events with dates, locations, organisers and recurrence rules.
Typical use: Flatten ICS to CSV to audit schedules, merge timetables or import into tools without calendar support.
About the ICS format
ICS is iCalendar (RFC 5545): the text format every calendar system imports and exports. Events carry start/end times, locations, organisers, attendees, alarms and recurrence rules — which makes an .ics attachment a small database of “what happens when”.
Flattening ICS to CSV turns that database into rows: one event per line with columns for time, place and summary — ideal for auditing a shared calendar, merging timetables or feeding a spreadsheet.
Strengths
- ✓ Universal calendar interchange
- ✓ Carries recurrence and alarms
- ✓ Plain text, easy to parse
Limitations
- ✗ Recurring events expand only on export
- ✗ Timezones are easy to get wrong
- Structure
- VEVENT / VTODO blocks
- Types / schema
- Dates, durations, text props
- Compatibility
- Google, Outlook, Apple Calendar
- Best for
- Schedules and event lists
Convert ICS to…
1 direct directions, sorted A–Z; 🔥 marks popular targets.
Convert other files to ICS…
Frequently asked questions
What is a ICS file?
ICS is iCalendar — the format every calendar app exports: events with dates, locations, organisers and recurrence rules.
How do I convert ICS files online?
Pick a target format from the "Convert ICS to…" list below, drop your file and hit convert. Everything runs in your browser — no install, no upload, no watermark, no limits.
Is it safe to convert ICS files here?
Yes. Every conversion is performed by your own device inside the browser — files never leave for a server, and the page keeps working even offline.
Which formats can ICS convert to?
This page lists all 1 directions across documents, images, audio, video, spreadsheets and archives — each one is its own free converter page.