Unix Timestamp Converter

Enter a Unix timestamp or a date to convert it. Seconds, milliseconds and ISO dates are detected automatically.

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A Unix timestamp number converted to a calendar date and clock time

What is Unix time?

Unix time counts the seconds elapsed since 00:00:00 UTC on 1 January 1970, known as the Unix epoch. It is time-zone independent, which is why systems, logs and APIs use it.

Seconds or milliseconds?

Many systems use seconds (10 digits today, such as 1767225600), while JavaScript and Java often use milliseconds (13 digits). This converter guesses from the length: up to 11 digits is read as seconds, 12–15 as milliseconds and 16 or more as microseconds.

Entering dates

Type an ISO date like 2026-01-01T09:30:00Z (the Z means UTC), or a simpler 2026-01-01 09:30, which is read in your local time zone. Add an offset such as +02:00 to be explicit.

Frequently asked questions

How do I convert a Unix timestamp to a date?

Paste the number. The tool shows the UTC date, ISO 8601 form and your local time.

What is the Unix epoch?

00:00:00 UTC on 1 January 1970, the zero point from which Unix time is counted.

What is the year 2038 problem?

Systems storing Unix time as a signed 32-bit number overflow on 19 January 2038. Modern 64-bit systems are unaffected.

Why is my date off by some hours?

A date without a time zone is interpreted in your local time zone. Add Z for UTC or an explicit offset.

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