/timestamp

Timestamp

Unix ↔ ISO 8601 ↔ human-readable, always in your local timezone.

Unix (seconds)

Unix (milliseconds)

ISO 8601

Human

How it works

What this is: Computers usually store time as seconds (or milliseconds) since 00:00:00 UTC on 1 January 1970 — the 'Unix epoch'. Humans prefer 2026-04-21T12:00:00Z. This converts between them.
How it works: Typing in any box parses the value with new Date() and fills in the others. Unix values are integers; ISO 8601 is the international date-time format; human output uses your browser's locale and timezone.
Worked example: Unix: 1713744000 Unix ms: 1713744000000 ISO: 2026-04-21T12:00:00Z Human: 21 April 2026, 12:00:00 UTC+0
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