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Unix Timestamp Converter

Inspect one moment across common timestamp formats. The converter makes timezone behavior visible and keeps every calculation on your device.

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Timestamp formats
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FIELD NOTES

Understanding Unix time

Unix time counts elapsed seconds since 00:00:00 UTC on January 1, 1970. JavaScript commonly uses milliseconds, while many APIs and databases use seconds.

A timestamp identifies a moment; a displayed calendar time also depends on a timezone. ISO and UTC output help make that distinction explicit.

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REFERENCE

Timestamp questions

Seconds or milliseconds?

Unix seconds have 10 digits today; JavaScript milliseconds usually have 13.

Which timezone is the input?

The date-time input is interpreted in your device's local timezone.

What does ISO use?

The ISO result is normalized to UTC and ends with Z.