Unix timestamp converter

Convert explicit seconds, milliseconds or microseconds to local, UTC and ISO dates.

3 guest runs per rolling 24 hours10 with a free accountPrivate inputsMobile-friendly

Unix timestamp converter workspace

Runs locally in your browser

Result

Unix seconds—

Milliseconds—

Local date—

ISO 8601 (UTC)

Use it with confidence

How to use the unix timestamp converter.

Add the requested inputs

Use the labelled fields in the workspace above. If example values are provided, try them first or replace them with your own.

Calculate and review

Use the main action when needed. The selected timestamp unit is normalised to milliseconds before creating a browser Date object.

Try a worked example

Choose seconds for 1,700,000,000 or milliseconds for 1,700,000,000,000 instead of relying on a hidden guess.

Check the assumptions

A local date can be ambiguous around daylight-saving changes; ISO output is always labelled in UTC.

Helpful answers