Unix Timestamp Converter

Live Unix Timestamp

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milliseconds: —

Enter Unix Timestamp

Seconds (s) Milliseconds (ms)

Pick a Date & Time

Interpret as

🌐 Your browser timezone: detecting…

What this tool does not do — read before relying on output

Timezone detection is browser-only. This tool reads your browser's reported timezone via Intl.DateTimeFormat(). It cannot detect VPN-mismatched timezones, OS-level overrides, or enterprise proxy offsets.
Local-time display depends on your browser. The "Local Date & Time" result uses toLocaleString(), which formats dates differently across browsers and OS locales. The format is not customisable here.
Valid range is 1970–2099. Timestamps outside this range are rejected. Negative timestamps (pre-1970) and far-future timestamps are not supported.
Milliseconds auto-detection in Seconds mode. If you enter a 13+ digit number while in "Seconds" mode, the tool assumes it's milliseconds and silently converts it. There is no warning shown. Switch to Milliseconds mode to be explicit.
Seconds input accepts decimals but truncates them. If you type 1717200000.999, the fractional part is discarded. Sub-second precision is lost.
Copy buttons require clipboard permission. On some browsers or HTTP (non-HTTPS) pages, navigator.clipboard is blocked. Copy buttons will silently fail in that case.
"Relative time" is approximate. Values like "3 days ago" round to the nearest whole unit and do not account for DST changes or leap seconds within that range.
Day-of-Year uses local time, not UTC. The day-of-year count is computed from the timestamp as interpreted in your local timezone. The UTC day-of-year may differ by ±1 day near midnight.
No server-side validation. All conversion happens in your browser. Results are only as accurate as your system clock.