Unix Timestamp Converter

Convert Unix timestamps to readable dates and local dates back to timestamps.

Timestamp to date

Read a Unix timestamp in seconds or milliseconds.

Timestamp

Unit

ISO 8601: Waiting for a valid timestamp.
Local time: Not available
UTC: Not available

Date to timestamp

The selected value is interpreted in your local time zone.

Local date and time

Seconds: Not available
Milliseconds: Not available

How this tool works

Convert in either direction

Paste a Unix timestamp and select whether it uses seconds or milliseconds. The tool shows ISO 8601, local, and UTC representations. You can also choose a local date and time to produce both timestamp formats.

Seconds or milliseconds?

A Unix timestamp counts time from 1 January 1970 at 00:00:00 UTC. Many server tools use seconds, while JavaScript and several APIs use milliseconds. A modern seconds timestamp has about 10 digits; its millisecond equivalent usually has 13.

ISO and UTC results describe the same instant independently of your location. The local result uses the time zone configured on this device.

Privacy

Conversions use the browser's built-in Date support. No date or timestamp is sent to a server.