Unix Timestamp Converter
Runs in your browserConvert a Unix timestamp to a readable date, or a date to a timestamp. Seconds and milliseconds are auto-detected; UTC and local time are both shown.
How to read the results
The epoch (seconds) and epoch (milliseconds) are the numeric timestamps. ISO 8601 is the machine-friendly UTC string; UTC and Local show human-readable times, and relative expresses the distance from now.
Examples
1700000000→ 2023-11-14T22:13:20Z0→ the Unix epoch, 1970-01-01T00:00:00Z
Leap seconds & precision
Unix time ignores leap seconds. Sub-second precision is preserved for millisecond+ inputs.
Conversion runs in your browser using the native date engine; local time reflects your device settings. Learn about our data sources →
Frequently asked questions
Does it auto-detect seconds vs milliseconds?
Yes. Based on the magnitude, the tool interprets the number as seconds, milliseconds, microseconds, or nanoseconds and normalizes it.
Which time zones are shown?
Both UTC and your browser’s local time, plus the ISO 8601 string. A relative time (e.g. "in 3 days") is also shown.
Is anything sent to a server?
No. All conversion happens in your browser using the built-in date engine.