Unix Timestamp Converter
Convert Unix epoch timestamps into readable dates and back again, handling both seconds and milliseconds.
How to use the Unix Timestamp Converter
- Paste a timestamp to convert it to a date, or pick a date to get its timestamp.
- The tool detects seconds or milliseconds automatically.
- Read the result in both UTC and local time.
About the Unix Timestamp Converter
Unix time counts seconds since 1 January 1970 UTC, which makes it compact and timezone-free — and unreadable to humans. The usual confusion is seconds versus milliseconds: a ten-digit number is seconds, thirteen digits is milliseconds, and mixing them up puts your date fifty thousand years out. Both are handled here, with results shown in UTC and your local time.
Frequently asked questions
What is a Unix timestamp?
The number of seconds elapsed since 1 January 1970 at 00:00 UTC, ignoring leap seconds.
Seconds or milliseconds — how do I tell?
Ten digits is seconds; thirteen digits is milliseconds. JavaScript uses milliseconds, most backends use seconds.
Does it handle timezones?
The timestamp itself is timezone-free. Results are shown in both UTC and your local timezone.
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Runs entirely in your browser — nothing you enter is uploaded. Last reviewed and updated .