Developer utility

Unix Timestamp Converter

Paste Unix seconds or milliseconds to see the same instant in UTC, local time, ISO 8601, and the timezones you choose.

Timestamp to date

Enter an integer, then choose how its unit should be interpreted.

Timezone Conversions

UTC
Fri, Sep 4, 2026, 16:00:00
UTC (UTC+00:00)
Eastern (New York)
Fri, Sep 4, 2026, 12:00:00
EDT (UTC-04:00)
London
Fri, Sep 4, 2026, 17:00:00
GMT+1 (UTC+01:00)
Tokyo
Sat, Sep 5, 2026, 01:00:00
GMT+9 (UTC+09:00)

Convert Unix seconds or milliseconds

Unix time counts from 1970-01-01T00:00:00Z. Ten-digit values commonly represent seconds; thirteen-digit values commonly represent milliseconds. Add an explicits or ms suffix when a value’s unit is ambiguous.

A timestamp has no timezone

A Unix timestamp identifies an instant. A timezone only changes how that instant is displayed. Convert the value once, then compare UTC, your local time, and any IANA zone without changing the underlying moment.

Common developer checks

  • Confirm whether an API uses seconds or milliseconds.
  • Turn log, token-expiry, and database timestamps into readable dates.
  • Compare the same event across production regions and user timezones.