DEVELOPER TOOLS · LOCAL ONLY
Convert between Unix seconds, milliseconds, ISO 8601, and local time.
Seconds and milliseconds are distinguished explicitly; dates use the browser time zone.
Run the tool to see the result
Seconds and milliseconds are distinguished explicitly; dates use the browser time zone.
How to use
Paste a timestamp and see ISO 8601, local time, seconds, and milliseconds at once, with no need to guess which unit it was. You can also paste a date string to get a timestamp, or read the current time directly. Every conversion happens in the browser.
Limits and privacy
Everything runs inside this browser. Your input is never uploaded, stored, or written to the URL or any log.