FreeFinder

About

For each date in the selected range, see a list of time slots when you have no events scheduled. Works with Google Calendar’s Day, Week, Month, and 4-Day views.

How to use:
1. Open Google Calendar and choose your preferred view (Day, Week, Month, or 4 Days).
2. Click the extension icon to display your available time slots.
3. Use the popup to set your preferred start and end times for the day — great for filtering out hours outside your waking or working schedule.
4. Set a minimum slot duration to only show time blocks long enough for your needs.
5. Use the chevron icon next to a day to expand or collapse its list of available time slots.
6. Select a date range, individual day, or specific time slot to copy availability to your clipboard. Deselect to remove it.

Settings:
1. Add a buffer before or after events to prevent listing slots that are too close to existing meetings.
2. Switch to time point mode to show availability as time points at set intervals (e.g., every 30 minutes). This respects all other filters and settings.

Documentation:
https://github.com/Ryan-Vakhshoori/gcal-availability-finder