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© Nutter Toolsnutter.tools
  1. Home
  2. PDF & files
  3. ICS Merger
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ICS merger

Merge up to 50 .ics calendar files into one valid calendar, keeping time zones and recurrence, with duplicate skipping and a conflict report.

This tool is in beta

Still being tested. If a result looks wrong, tell us.

Report a problem

Add calendars, then merge to see the report and the file.

Event lines travel exactly as exported, so recurrence rules, excluded dates, and changed occurrences stay linked by UID. One time-zone definition travels per TZID name, first one wins, and two different definitions under one name are reported rather than resolved. Times are never converted; zones ride with their events. This tool does not clean up look-alike events that carry different UIDs, and it does not expand recurrence into single occurrences. Everything runs in this tab and nothing is uploaded.

Calendars

Files merge top to bottom. The first file donates the calendar name, colour, default time zone, and method; move the one you want first to the top.

No calendars yet. Pick .ics exports or load the samples.

Skips an event whose UID and changed-occurrence date already appeared in an earlier file

Up to 50 files, 25 MB each, 50,000 events in total. The merged file is re-parsed before download and the download is withheld if the counts disagree.

More PDF & file tools

  • Calendar files (ICS)
  • Contact cards (vCard)
  • Cron explainer
All PDF & file tools

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