Unix Timestamp Converter

The top panel ticks the current Unix time once per second in both seconds and milliseconds — copy either with a click. Below, two converters work in opposite directions: feed it a Unix timestamp (auto-detect seconds or milliseconds) to see the same instant in your local time zone, in UTC, in ISO 8601, the weekday, and a human-readable relative phrase. Or type a date in YYYY-MM-DD HH:MM:SS form to get the timestamp in both seconds and milliseconds.

Everything is computed locally in your browser using Intl.DateTimeFormat and Intl.RelativeTimeFormat for native locale formatting.