Converters

Unix Timestamp Converter

Convert Unix epoch timestamps to dates and timezones instantly.

100% client-side · Data never leaves your device · Free forever

Mode

Epoch valueUnit

Date string

ISO 8601: —
UTC: —
Local: —
Unix (seconds): —
Unix (ms): —

Convert epoch to date

Enter a Unix timestamp in seconds or milliseconds to see ISO, UTC, and local representations. Or paste an ISO-8601 string to get epoch values back.

Why developers need an epoch converter

Logs, JWT exp claims, databases, and APIs mix second and millisecond precision. A quick converter prevents off-by-1000 bugs when debugging production data.

Frequently asked questions

What is a Unix timestamp?+

A Unix timestamp is the number of seconds (or milliseconds) since 1970-01-01T00:00:00Z, also called the epoch.

Seconds or milliseconds?+

Classic Unix time uses seconds (10 digits today). JavaScript Date.now() uses milliseconds (13 digits). This tool auto-detects long numeric values as ms.

Is conversion done offline?+

Yes. All date math runs in your browser with the JavaScript Date API.