Unix Timestamp Converter
Convert between epoch numbers and human dates, in either direction.
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About this tool
Detects seconds versus milliseconds by magnitude, and shows the result in ISO 8601, UTC, and your browser's local zone at once.
Limitations
- Seconds/milliseconds detection is a heuristic based on digit count. You can override it.
Questions
- Seconds or milliseconds?
- Unix time is defined in seconds, but JavaScript, Java and most JSON APIs use milliseconds. A ten-digit number is almost certainly seconds; thirteen digits is milliseconds.
Privacy
This page does its work in your browser. What you paste is processed by JavaScript running on your own device and is never sent to a DevToolery server — there is no server that could receive it. The page itself is a static file delivered by a CDN. See exactly what is stored.