WebDevToolsUnix time
A Unix timestamp counts the seconds since 1970-01-01 00:00:00 UTC (the Unix epoch), ignoring leap seconds. It is time-zone independent, which makes it ideal for storing and comparing instants.
Different systems use different precisions:
| Unit | Digits (today) | Typical source |
|---|---|---|
| Seconds | 10 | Unix date +%s, most APIs |
| Milliseconds | 13 | JavaScript Date.now(), Java |
| Microseconds | 16 | PostgreSQL, Python time.time_ns() // 1000 |
| Nanoseconds | 19 | Go time.UnixNano() |
The converter detects the unit automatically from the number’s size, and you can override it.
Converting a date to a timestamp
Enter an ISO 8601 date like 2024-05-01T12:00:00Z. If you leave out the offset, the date is read in the time zone you selected.