Search for a city or add it from the list, and the tool shows its current local time alongside any other cities you've added, updating live.
The clock uses your device's own clock and the browser's built-in IANA time zone database (Intl.DateTimeFormat), so each city shows the correct local time including daylight saving.
Enter a time and pick the source city. The tool treats that as the wall-clock time in the source zone and shows the exact matching local time in every other city.
No. All conversions run entirely in your browser with no network calls, so your data never leaves your device.