Enter a Unix timestamp in seconds or milliseconds to convert it to a human-readable date.
Click Convert Timestamp to Date to see the local time, UTC time, and relative time.
To go the other way, pick a date and time using the datetime-local picker.
Click Convert Date to Timestamp to get the Unix timestamp in seconds, milliseconds, and ISO 8601 format.
All calculations and data stay in your browser. Nothing is uploaded or stored.
Get instant, precise results with no waiting. Just input and calculate.
No registration, no fees, no daily limits. Use any tool as often as you need.
Fully responsive. Works on desktop, tablet, iPhone, and Android.
Yes. If the timestamp is less than 100 billion, it treats it as seconds. Larger values are treated as milliseconds for accurate conversion.
It shows the time in your local timezone (detected from your browser) as well as UTC, so you always have both perspectives.
Yes. The tool supports negative Unix timestamps representing dates before the Unix epoch (before January 1, 1970).