Current timestamp
Refreshes every second. Pause it when you need to compare a fixed value.
Timestamp converter
Timestamp converter
Convert Unix timestamps and date times locally in your browser with seconds, milliseconds, UTC, local time, and common IANA time zones.
Frontend onlySeconds / millisecondsUTC offsets
Timestamp to date time
Enter a 10-digit seconds timestamp or 13-digit milliseconds timestamp, then choose the target time zone.
Input unit
Selected timezone time-
ISO 8601-
UTC time-
Timezone-
UTC offset-
Date time to timestamp
Enter a date and time, choose the input timezone, and generate seconds and milliseconds timestamps.
Seconds timestamp-
Milliseconds timestamp-
ISO 8601-
UTC time-
Input timezone-
UTC offset-
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Local processing
Conversions use only browser Date and Intl APIs. The page does not call a backend, write values to the URL, or save anything to browser storage.
Built for practical checks
API debugging
Check seconds or milliseconds timestamps from logs, API responses, and database fields.
Timezone review
Choose common IANA time zones and show UTC offsets so daylight saving and regional differences are visible.
Local safety
Input is calculated only on the current page, with no upload or saved history.