Productivity

TIMEZONE CONVERTER

World clock, meeting planner, timezone browser, and converter — all in one tool.

Private by design No signup · Free

World Clocks

Time Travel

Converter

From

Date

Time

Meeting Planner

Business (9-17) Overlap Morning Day Evening Night

Timezone Browser

History

Frequently Asked Questions

Is my data saved between sessions?

Data is stored locally in your browser using localStorage. Clearing your browser data will remove it. With Timezone Converter, no account is needed.

Can I lose my data?

Since data is stored locally, clearing browser data or using a different device will not carry over your information. With Timezone Converter, no account is needed.

Does this work offline?

Yes. Once loaded, conversions use the built-in timezone database fully offline. Convert meeting times anywhere with no connection needed.

Is my data private?

Absolutely. Everything stays in your browser. No data is sent to any server or third party. With Timezone Converter, no account is needed.

How do I add timezones to the world clock?

Select a timezone from the dropdown and click Add. The clock appears instantly with current time, date, UTC offset, and DST indicator. You can add as many timezones as you need.

How does the meeting planner work?

The meeting planner shows a 24-hour grid for all your added timezones. Business hours (9am—5pm local time) are highlighted in blue. Overlapping business hours across all zones are highlighted in green, making it easy to find meeting times.

Does this tool handle Daylight Saving Time?

Yes. The tool uses the browser's Intl API for all timezone conversions, which is DST-aware automatically. Clocks currently in DST show a green left border and a DST label.

Is my data saved between visits?

Yes, your selected timezones and conversion history are saved in your browser's local storage. They persist until you clear browser data.

Can I share my timezone list?

Yes, click the Copy button above the world clocks to copy all your timezones with current times and offsets as formatted text.

How to Use

Add Timezones

Use the dropdown to add cities/timezones to your world clock dashboard. Sort them by offset or search by name.

Convert Times

Select From/To timezones, pick a date and time, and click Convert. The result shows the converted time with date and offset difference.

Plan Meetings

Use the meeting planner grid to find overlapping business hours across all your timezones at a glance.

How to Calculate

Times convert through UTC offsets with daylight-saving tables per zone, so IST to EST math stays right across March and November shifts. Overlap view finds working hours shared by all parties.

About the Timezone Converter

The Timezone Converter is a free, browser-based tool for managing time across multiple timezones. It combines a world clock dashboard, timezone converter, meeting planner, and timezone browser into one integrated tool.

All processing is done locally using the browser's built-in Intl API — no data is sent to any server, no tracking, no sign-up required. The tool is fully DST-aware and works offline after the initial page load.

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Methodology & feedback

Figures run locally in your browser from the values you enter (page updated 2026-10-02). Estimates are educational only — verify finance, tax and health decisions with a qualified professional (see Disclaimer). Spotted an error? Report it via contact and we correct with a new update date.

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