Unix Timestamp Converter
Convert epoch seconds, milliseconds and calendar dates in both directions.
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Date to timestamp
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How to use Unix Timestamp Converter
- 1Enter a Unix timestamp in seconds or milliseconds, or choose a local date and time.
- 2Use Auto detect unless you need to force a specific timestamp unit.
- 3Review the UTC, local and ISO 8601 representations.
- 4Copy the seconds, milliseconds or formatted date you need.
Translate epoch values into dates you can reason about
A Unix timestamp converter helps debug API responses, database records, logs, cache expiry and scheduled jobs. It shows the same instant in UTC and in your browser's local timezone.
When exchanging timestamps between systems, document whether the value uses seconds or milliseconds. A unit mismatch can shift dates by decades.
Frequently asked questions
What is a Unix timestamp?
It is a count of elapsed time since 00:00:00 UTC on January 1, 1970. Many systems use seconds, while JavaScript commonly uses milliseconds.
How can I tell seconds from milliseconds?
Current timestamps are usually 10 digits in seconds and 13 digits in milliseconds. Auto detect uses the numeric magnitude rather than relying only on digit count.
Does a Unix timestamp include a timezone?
No. A timestamp represents one instant. Timezones affect only how that instant is displayed as a calendar date and clock time.
Why is the local time different from UTC?
Local output applies your browser device timezone and daylight-saving rules. UTC output uses the zero-offset international reference time.
Can it convert dates before 1970?
Yes. Dates before the Unix epoch are represented with negative timestamps.