Timestamp Converter

Timestamp Converterについて

A Unix timestamp (also called Epoch time) is the number of seconds that have elapsed since January 1, 1970 at 00:00:00 UTC. It is the standard time representation used by operating systems, databases, and web APIs because it is timezone-agnostic, always increasing, and trivial to compare or subtract. This converter makes it easy to translate between raw Unix timestamps and human-readable dates in both directions. You can paste a Unix timestamp (seconds or milliseconds are both accepted) to instantly see the equivalent local time, UTC, ISO 8601, and a relative description such as "3 days ago". Conversely, you can type a natural date string to get its Unix equivalent in seconds and milliseconds. A live clock shows the current Unix timestamp updating every second, which you can click to load into the converter. All processing runs entirely in your browser — no network requests are made — so the tool works offline and is completely private.

Timestamp Converterの使い方

1. Observe the live counter at the top to see the current Unix timestamp updating in real time.
2. To convert a timestamp to a date: paste or type a Unix timestamp (seconds or milliseconds) into the "Timestamp to Date" field.
3. The tool will instantly display the equivalent Local Time, UTC, ISO 8601 string, and relative time.
4. To convert a date to a timestamp: type a date string such as "2025-06-15 09:00:00" into the "Date to Timestamp" field.
5. The tool shows the Unix value in both seconds and milliseconds, plus ISO 8601 and relative formats.
6. Click any Copy button to copy a specific value to your clipboard.

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