Unix Timestamp Converter - Epoch to Date & Time Zones

A Unix timestamp represents elapsed time since 1970-01-01 00:00:00 UTC. It is commonly stored as 10 digits in seconds or 13 digits in milliseconds.

Input never leaves your device. Processing uses your local computer only.

Timestamp conversion and time zone calculations happen entirely in your current browser.

Numeric input at or below 9,999,999,999 is treated as Unix seconds, while larger values are treated as Unix milliseconds. For current dates, a typical 10-digit value is seconds and a 13-digit value is milliseconds, but you should still confirm the unit used by the source system.

A Unix Timestamp represents one instant and does not contain a time zone. ISO strings with Z or a UTC offset use that offset, while date strings without a time zone are interpreted in the browser local time zone. The converted instant is displayed in UTC, local time, and 9 zones: UTC, Seoul, Tokyo, Shanghai, New York, Los Angeles, London, Paris, and Sydney.