Free Online Time Zone Tools

World clock with 400+ cities, timezone converter, meeting planner for global teams, countdown timers, flight arrival time, and jet lag planning. All in your browser.

Tools

World Clock

Display multiple city clocks simultaneously. Add cities from 400+ worldwide locations with analog and digital displays.

Open tool

Time Zone Converter

Convert time between any two timezones instantly. Batch convert to see one time across multiple zones.

Open tool

Meeting Planner

Find overlapping working hours across timezones. Visual timeline with green-zone highlights for the best meeting slots.

Open tool

Countdown Timer

Countdown to any date and time in any timezone. Preset countdowns for New Year across the globe and major holidays.

Open tool

Flight Time Calculator

Calculate adjusted arrival time across time zones for common international routes, including local departure and arrival times.

Open tool

Jet Lag Calculator

Estimate recovery days and get practical sleep-shift guidance before long-distance travel across time zones.

Open tool

How It Works

Step 1

Choose a Tool

Pick from 6 timezone tools — world clock, converter, meeting planner, countdown, flight time, or jet lag.

Step 2

Add Cities & Times

Search 400+ cities worldwide and set your dates, times, and timezones.

Step 3

Convert & Share

Get instant conversions, find overlap, and copy or share results with one click.

FAQ

Is FreeTimeZone really free?

Yes, 100% free. No sign-up, no usage limits. Use all timezone tools without any restriction.

Is my data safe?

Absolutely. All processing happens entirely in your browser. No data is ever sent to any server.

How many timezones are supported?

FreeTimeZone supports all IANA timezones with a built-in database of 400+ cities worldwide. It uses the browser's native Intl API for accurate conversions.

Does it handle Daylight Saving Time?

Yes. FreeTimeZone automatically accounts for DST transitions using the Intl.DateTimeFormat API, which follows the official IANA timezone database.

Can I save my selected cities?

Yes. Your World Clock city selections are saved to localStorage and persist between browser sessions. No account needed.

Do I need to install anything?

No. FreeTimeZone works entirely in your browser. No downloads, no extensions, no sign-up required.

Free Online Time Zone Tools

World clock with 400+ cities, timezone converter, meeting planner for global teams, countdown timers, flight arrival time, and jet lag planning. All in your browser.

Tools

World Clock

Display multiple city clocks simultaneously. Add cities from 400+ worldwide locations with analog and digital displays.

Open tool

Time Zone Converter

Convert time between any two timezones instantly. Batch convert to see one time across multiple zones.

Open tool

Meeting Planner

Find overlapping working hours across timezones. Visual timeline with green-zone highlights for the best meeting slots.

Open tool

Countdown Timer

Countdown to any date and time in any timezone. Preset countdowns for New Year across the globe and major holidays.

Open tool

Flight Time Calculator

Calculate adjusted arrival time across time zones for common international routes, including local departure and arrival times.

Open tool

Jet Lag Calculator

Estimate recovery days and get practical sleep-shift guidance before long-distance travel across time zones.

Open tool

How It Works

Step 1

Choose a Tool

Pick from 6 timezone tools — world clock, converter, meeting planner, countdown, flight time, or jet lag.

Step 2

Add Cities & Times

Search 400+ cities worldwide and set your dates, times, and timezones.

Step 3

Convert & Share

Get instant conversions, find overlap, and copy or share results with one click.

FAQ

Is FreeTimeZone really free?

Yes, 100% free. No sign-up, no usage limits. Use all timezone tools without any restriction.

Is my data safe?

Absolutely. All processing happens entirely in your browser. No data is ever sent to any server.

How many timezones are supported?

FreeTimeZone supports all IANA timezones with a built-in database of 400+ cities worldwide. It uses the browser's native Intl API for accurate conversions.

Does it handle Daylight Saving Time?

Yes. FreeTimeZone automatically accounts for DST transitions using the Intl.DateTimeFormat API, which follows the official IANA timezone database.

Can I save my selected cities?

Yes. Your World Clock city selections are saved to localStorage and persist between browser sessions. No account needed.

Do I need to install anything?

No. FreeTimeZone works entirely in your browser. No downloads, no extensions, no sign-up required.