Unix Timestamp Converter – Seconds or Milliseconds
Convert explicit Unix seconds or milliseconds to UTC and local time without guessing the unit.
Choose the timestamp unit yourself so values are never silently interpreted as the wrong scale.
How it works
Seconds are multiplied by 1,000; milliseconds are used directly before constructing the date.
Example
0 seconds → 1970-01-01T00:00:00.000Z
Frequently asked questions
Does it guess seconds vs milliseconds?
No. You select the unit explicitly.
What does local time mean?
It uses the browser/device local timezone for the local display only.
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