Date-Time Converter

ISO 8601

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UTC

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Local Time

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Relative

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How to use this date-time converter

  1. Type a Unix timestamp in seconds, or click "Use current time".
  2. All four formats (ISO 8601, UTC, local time, relative) update instantly.
  3. Copy whichever format your system or API needs.

What is a Unix timestamp?

A Unix timestamp counts the number of seconds elapsed since January 1, 1970 (UTC), known as the Unix epoch. It's a compact, timezone-independent way to store dates in databases and APIs.

Why does my local time look different from UTC?

UTC is a fixed reference point with no timezone offset. Your "Local Time" is calculated using your device's timezone setting, which is why the two can differ by several hours.

Is this timestamp in seconds or milliseconds?

This tool uses seconds, the traditional Unix standard. JavaScript's own Date object uses milliseconds internally, which is a common source of off-by-1000 bugs.