Timestamp converter
Convert between Unix time, ISO strings, local formatting, and relative phrases - all in your browser.
Numeric input: values ≥ 10¹¹ are treated as milliseconds; smaller non-negative numbers are seconds since the Unix epoch. You can also paste ISO 8601 strings (e.g. 2025-03-22T12:00:00Z) or other strings Date.parse understands. Relative uses your locale (Intl.RelativeTimeFormat).
- Unix (seconds)
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- Unix (milliseconds)
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- ISO 8601 (UTC)
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- Local
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- Relative to now
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