Unix Timestamp Converter
Paste a Unix timestamp to see the UTC date, or paste a date to get the epoch. Seconds and milliseconds are detected automatically, and everything runs in your browser.
How to convert a Unix timestamp
- Enter a Unix timestamp to see the matching ISO and UTC date.
- Or enter a date and time to read its epoch in seconds and milliseconds.
- Use the Now button for the current time, then copy the value you need.
Examples
Timestamp to date
1700000000
2023-11-14T22:13:20.000Z
Date to timestamp
2023-11-14T22:13:20Z
1700000000 (seconds)
Frequently asked questions
What is a Unix timestamp?
It is the number of seconds that have passed since midnight UTC on 1 January 1970, known as the Unix epoch. It is a simple, time-zone-free way to store an instant in time.
Seconds or milliseconds: which does this use?
Both. Unix time is classically in seconds, but JavaScript and many APIs use milliseconds. Values with a magnitude of 1e12 or more are read as milliseconds, smaller ones as seconds, and the tool shows you both.
What time zone are the dates in?
All output dates are in UTC. A Unix timestamp has no time zone, so converting it always gives a UTC instant. Use a time zone converter if you need local time.
What is the year 2038 problem?
Systems that store Unix time in a signed 32-bit integer overflow at 03:14:07 UTC on 19 January 2038. Modern 64-bit systems and this tool use larger numbers, so they are unaffected.
Can I convert dates before 1970?
Yes. Dates before the epoch are negative timestamps. For example, 1969-12-31 is a negative number of seconds, and the converter handles it correctly.
Is my data sent to a server?
No. The conversion runs entirely in your browser, so any timestamp or date you enter stays on your device.
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