Introducing the Unix Timestamp Converter — Epoch to Date & Back

The new Unix Timestamp Converter converts Unix timestamps to human-readable dates (and back), with automatic seconds/milliseconds detection, UTC offset support, and relative time.

Three modes

Timestamp → Date — paste a Unix timestamp (seconds or milliseconds — auto-detected). Get ISO 8601, UTC string, local string, date components, ISO week number, and relative time (“3 days ago”).

Date → Timestamp — paste an ISO 8601 string or YYYY-MM-DD HH:MM:SS. Get the Unix timestamp in both seconds and milliseconds.

Current Time — live view of the current Unix timestamp, updating in real time.

Auto-detection

The converter uses a simple rule: 10-digit values are seconds, 13-digit values are milliseconds. JavaScript’s Date.now() is milliseconds; server logs and most POSIX tools are seconds. The converter handles both without manual mode-switching.

UTC offsets

The UTC offset dropdown covers every half-hour step from UTC−12:00 to UTC+14:00. Set UTC+05:30 for IST to see your local time without relying on browser timezone settings.

Everything at once

One paste gives you: Unix seconds, Unix milliseconds, ISO 8601, UTC string, local string, day of week, week number, and relative time. Copy any field individually.

Try it

Open the Unix Timestamp Converter. For format reference and use cases, read the guide.