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Browser Extension

Timezones, right where you work

Convert timezones, check work hours overlap, and create calendar meetings - directly from Chrome or Edge, without switching tabs.

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Free  ·  No account required  ·  Works offline

TimezoneHelp extension - timezone converter
Work Hours Overlap

Know exactly when your teams can meet

Stop guessing which hours work for everyone. TimezoneHelp shows you the real overlap window between any two cities, based on your team's actual working hours.

  • Set custom work hours for each timezone
  • See overlap gaps at a glance
  • Works for any two cities worldwide
Work Hours Overlap view
Create Meeting

Schedule meetings without leaving your tab

Pick a time, see it instantly across all your saved timezones, and open the event straight in your calendar - no copy-pasting, no tab switching.

  • Open directly in Google Calendar or Outlook
  • Send a Teams invite in one click
  • Download a .ics file for any calendar app
Create Meeting modal
Everything else you need
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600+ Timezones

Search by city, country, or alias and find the right zone instantly.

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Auto-saved Picks

Your timezones are remembered every time you open the extension.

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Works Offline

All calculations happen in your browser. No internet required.

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Completely Free

No subscription, no sign-in, no catch. Just install and use it.

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Your data stays on your device

TimezoneHelp stores your selected timezones and settings in your browser's local storage only. Your meeting details, timezone picks, and preferences are never sent to any server.

Get TimezoneHelp for free

Join thousands of remote workers who schedule smarter.

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