Question 1

Why does Google Calendar fail to import my exported calendar?

Accepted Answer

Google Calendar has a strict file size limit (usually ~1MB to 1.8MB) for web uploads.

When you export a calendar with years of history, the resulting `.ics` file is often 5MB to 20MB. Splitting the file into valid chunks under 1MB allows smooth batch importing without server timeouts.

Question 2

Will recurring events or timezone settings be lost after splitting?

Accepted Answer

Not at all!

① Full Global Headers Preserved:
All `VCALENDAR` properties and `VTIMEZONE` blocks from the original file are replicated in every single split chunk header.

② Intact Event Blocks:
Each `VEVENT` component (including recurrence rules `RRULE`, alarms `VALARM`, descriptions, and locations) is kept completely intact.

Question 3

Is it safe to upload my personal or corporate calendar data?

Accepted Answer

100% safe and private!

All text parsing, splitting, and ZIP packaging are performed locally in your web browser memory. No data is ever transmitted to any external server. It even functions seamlessly without an internet connection.

Question 4

Should I choose 900 KB or 950 KB as the split threshold?

Accepted Answer

We recommend 950 KB or 900 KB. Setting a threshold slightly below the 1MB cap provides a safe margin for headers and ensures guaranteed acceptance by Google Calendar import filters.

Question 5

Does this tool support Apple Calendar and Microsoft Outlook .ics files?

Accepted Answer

Yes! The generated `.ics` files adhere strictly to RFC 5545 standards and are fully compatible with Apple Calendar (macOS/iOS), Outlook, Thunderbird, and any iCalendar-supported application.

Google Calendar ICS Splitter

Frequently Asked Questions (FAQ)5 Q&As