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THE FEUTEX TOOLKIT

Calendar Conflict Checker

Find overlapping UTC or all-day events in an ICS export, with overlap duration for each pair.

Planning workspace● Runs in your browser
01 Your input
02 Your result

Made for real tasks

  • Check a one-off workshop schedule before distributing invitations.
Explore step-by-step workflows →

How to use this tool

  1. Choose your files or enter the requested values.
  2. Review the scope and load the example where available.
  3. Run the tool, inspect the result and download or copy it.

Try this example

BEGIN:VCALENDAR
VERSION:2.0
BEGIN:VEVENT
UID:example-1
DTSTART:20261020T090000Z
DTEND:20261020T100000Z
SUMMARY:Planning
END:VEVENT
BEGIN:VEVENT
UID:example-2
DTSTART:20261020T093000Z
DTEND:20261020T103000Z
SUMMARY:Review
END:VEVENT
END:VCALENDAR

Accuracy and scope

Non-recurring UTC events or all-day dates only. Named time zones and recurrence rules are rejected. Cancelled and transparent events are excluded. At most 2,000 events and 10,000 conflicts.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.