Guide1 min readUpdated July 1, 2026

How to merge ICS calendar files

Short answer

Add each .ics file to a calendar merger and export a single combined .ics. All the events land in one file you can import into any calendar app in one step.

Why merge calendar files

Schedules often arrive as separate .ics files — a work calendar, a class timetable, a sports fixture list. Merging them into one file means a single import instead of many, and one place to review every event. See what is an ICS calendar file.

Merge the files

Add the .ics filesDrop in each calendar file. They are parsed locally in the tab.
CombineThe events from every file are gathered into one calendar.
Export one .icsDownload the merged file, ready to import anywhere.

Try it: ICS Calendar MergerMerge multiple .ics files into one locally — nothing is uploaded.Open tool

Import into any calendarThe merged .ics imports into Google Calendar, Apple Calendar, and Outlook. In most apps, use Import (not Subscribe) to add the events as a one-time copy.

Good to know

Merging copies events; it does not keep the source files in sync
Duplicate events across files may appear twice — review before importing
Time zones stored in each event are preserved in the merged file
Keep the originals if you need to re-merge after changes

References

Questions

Will merging keep my calendars in sync?

No. Merging produces a one-time combined file. If a source calendar changes later, re-merge to pick up the updates. For live sync, subscribe to a calendar URL instead.

Can I import the merged file into Google Calendar?

Yes. Google Calendar, Apple Calendar, and Outlook all support importing an .ics file, which adds all its events at once.

Are my calendar files uploaded?

No. The files are read and merged inside your browser tab. Nothing is uploaded or stored on a server.