Your files stay on your device

# Read or write a calendar file

See what is inside a calendar file, or make a simple one with your own events.
ICS sourceOr load an .ics fileDrop a file hereNothing is uploadedChoose fileSummaryStartEnd (optional)All-dayClock times areLocationDescriptionBuild .ics

- No VTIMEZONE interpretation. TZID times are shown as wall-clock strings exactly as written, and creation offers UTC or floating only.
- RRULE support is the FREQ/INTERVAL/COUNT/UNTIL subset; BY* rules are named and left unexpanded instead of guessed at.
- No calendar lookups, invitations, or scheduling: this reads and writes text, with no network at all.
Paste, drop, or type to begin. Everything stays on this device.

## More PDF & file tools

- [Contact cards (vCard)](/files/vcard)
- [Cron explainer](/dev/cron)
- [ISO 8601 duration](/time/iso-duration)
[All PDF & file tools](/files)

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Canonical HTML: https://nutter.tools/files/ics/
Markdown version: https://nutter.tools/files/ics/index.md
Plain-text version: https://nutter.tools/files/ics/index.txt
Agent index: https://nutter.tools/llms.txt