Unix timestamp converter.
Turn Unix timestamps into ISO 8601 dates, or convert dated ISO strings back into Unix seconds and milliseconds.
Free & unlimitedNo sign-up requiredRuns in your browser
Unix timestamp → readable date
UTC date2023-11-14T22:13:20.000ZTue, 14 Nov 2023 22:13:20 GMT
ISO date → Unix timestamp
Seconds since 1 January 1970 (UTC)17937504001793750400000 milliseconds
Timestamps represent an instant, not a timezone. All displayed dates are shown in UTC so results don’t change with your device’s locale.
How to use this tool
- Enter a Unix timestamp and select seconds or milliseconds.
- Read the UTC date and copy the ISO value.
- Alternatively enter an ISO 8601 date with a timezone to obtain a Unix timestamp.
Good to know
A Unix timestamp identifies an instant. This converter displays UTC so results do not shift between device time zones.
This utility processes its content locally in your browser. No usage counter is required while public tools are free and unlimited. As with any online tool, avoid entering sensitive information on devices you do not trust.