🌐 Time Zone Converter — Convert to Multiple Cities at Once
This free time zone converter runs entirely in your browser with no upload or login required — just pick a base time and city, then see the equivalent time in Seoul, Tokyo, New York, London, UTC, and more instantly.
Base time
Target timezones
About
Set any date and time in your chosen base timezone — or hit 'Now' to use the current moment — then add as many target timezones as you need from cities like Seoul, Ho Chi Minh, Tokyo, Shanghai, London, Paris, New York, Los Angeles, and Sydney. Converted times update instantly and can be copied with one click. Because everything runs client-side in your browser, your schedule data never leaves your device and the tool works completely offline.
How to use
- Select a date and time in the 'Base time' panel, or click 'Now' to load the current time.
- Choose the timezone that your base time is in (e.g., Seoul, UTC, New York) from the 'Base timezone' dropdown.
- In the 'Target timezones' panel, pick a city from the dropdown and click '＋ Add' to add it to the list.
- Read the converted time and date for each city instantly — results update automatically as you change the base time.
- Click the copy icon on any row to copy that city's result to your clipboard.
FAQ
- Is this time zone converter free?
- Yes, completely free — no account, no subscription, no hidden fees of any kind.
- Does it upload my data to a server?
- No. All conversion happens locally in your browser using the browser's built-in Intl API. Nothing is sent to any server.
- Does it work offline?
- Yes. Once the page is loaded, it works with no internet connection — ideal for travel or restricted networks.
- Which timezones are supported?
- The tool supports 10 major cities and zones: Seoul (KST), Ho Chi Minh (ICT), Tokyo (JST), Shanghai (CST), UTC, London (GMT/BST), Paris (CET/CEST), New York (EST/EDT), Los Angeles (PST/PDT), and Sydney (AEDT/AEST).
- Does it handle Daylight Saving Time (DST) correctly?
- Yes. The converter uses the browser's native Intl.DateTimeFormat API, which automatically applies the correct DST rules for each timezone based on the selected date.