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Unix Timestamp Converter

Unix epoch timestamp converter for seconds and milliseconds with UTC, local time, and ISO 8601 output.

Unix time counts elapsed seconds from January 1, 1970 at 00:00:00 UTC. Convert a timestamp into readable UTC, local, and ISO 8601 formats.

The tool automatically interprets large values as milliseconds. It does not account for leap seconds.

Frequently asked questions

What is the Unix epoch?

January 1, 1970 at 00:00:00 UTC.

How are seconds and milliseconds detected?

Values with a magnitude above 100 billion are treated as milliseconds; smaller values are treated as seconds.

Does Unix time include time zones?

The timestamp represents one instant. Time zones affect only how that instant is displayed.