Unix timestamp converter

A Unix timestamp counts the seconds since 1 January 1970 00:00:00 UTC, the Unix epoch. It is how most databases, logs, APIs and programming languages represent moments in time internally, because it is a single number that is independent of time zones. This converter turns timestamps into human-readable dates and back.

How to use it

1. Paste a timestamp to see it as ISO 8601, UTC, your local time and relative time (such as 3 hours ago).
2. Or pick a date and time to get its timestamp in seconds and milliseconds.

Seconds or milliseconds?

Unix tools, PHP, Python's time.time() and most databases use seconds: a current value has 10 digits, such as 1793093400. JavaScript's Date.now() and Java use milliseconds: 13 digits, such as 1793093400000. The converter detects which one you pasted from the length.

Example

1793093400 is 2026-10-27T09:30:00Z, which is 15:00 in India (IST) and 05:30 in New York (EDT).

Code snippets

• JavaScript: Math.floor(Date.now() / 1000) and new Date(ts * 1000).toISOString()
• Python: int(time.time()) and datetime.fromtimestamp(ts, tz=timezone.utc)
• Shell: date +%s and date -u -d @1793093400
• PostgreSQL: to_timestamp(1793093400) and extract(epoch from now())

Good to know

• Unix time ignores leap seconds.
• Signed 32-bit timestamps overflow on 19 January 2038 (the Year 2038 problem); use 64-bit integers.
• Negative timestamps represent dates before 1970.