Epoch- & Unix-Zeitstempel-Konverter

Konvertieren zwischen Unix-Zeitstempeln (Sekunden / ms / µs / ns) und menschlich lesbaren Daten mit Zeitzonen — live, mit Auto-Erkennung und kopierfreundlich.

Aktuelle Zeit
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—
Zeitstempel
Ausgabe
UTC — Lokal — ISO 8601 — RFC 2822 — Relativ —
Datum / Uhrzeit
Ausgabe
Unix (s) — Unix (ms) — Unix (µs) — Unix (ns) —

What is this epoch converter?

This free tool converts between Unix timestamps (seconds, milliseconds, microseconds and nanoseconds) and human dates in UTC, local time, ISO 8601 and RFC 2822 — with a live ticking now-clock, smart unit auto-detection and one-click copy on every output.

How do I convert a Unix timestamp to a date online?

Paste a timestamp on the left tab and the date appears in UTC, local time, ISO 8601, RFC 2822 and a relative form — or switch to the right tab to turn a date into all four Unix unit timestamps.

Key features

Live now clock
The hero card updates every second with the current Unix time in seconds, milliseconds, microseconds and nanoseconds.
Auto-detect units
Paste any digit string — the converter guesses seconds, ms, µs or ns from its length, and you can override it.
Bidirectional
Convert from timestamp to date or from a date string to all four Unix units; both flows run independently and live.
ISO 8601 + RFC 2822
Output includes both standard machine-readable formats so you can drop them straight into code or email headers.

How to use it

Open the Timestamp → Date tab, paste or type a number, then read the date in UTC, local time, ISO 8601 and RFC 2822. The Date → Timestamp tab does the reverse and gives you the timestamp in seconds, ms, µs and ns at once.

Frequently asked questions

What is a Unix timestamp?

A Unix timestamp counts the seconds elapsed since 1970-01-01 00:00:00 UTC, excluding leap seconds. Languages and APIs vary in whether they expose it as seconds, milliseconds, microseconds or nanoseconds.

How does the converter know which unit I pasted?

The auto-detector guesses based on magnitude: 10-digit numbers are seconds, 13-digit numbers are milliseconds, 16-digit numbers are microseconds and 19-digit numbers are nanoseconds. You can always force a unit with the dropdown.

Will dates after 2038 still work?

Yes. The browser uses 64-bit doubles for time math, so it isn't affected by the classic 2038 Y2K-style overflow that limits 32-bit signed seconds.

Is the timestamp I paste sent anywhere?

No. The converter is entirely client-side; the value lives only in the page DOM and disappears when you close the tab.

Date formatting uses the browser's native Date and Intl APIs. ISO 8601 output matches RFC 3339 and SQL TIMESTAMP WITH TIME ZONE; RFC 2822 matches the email Date header. Local time honours the browser-detected IANA timezone.