Date to Unix Timestamp Converter
Turn any date and time into Unix seconds and milliseconds.
Unix time counts seconds since 1970-01-01 00:00 UTC and ignores leap seconds; it is the format store keys, log lines and APIs actually use. Pairs with the Timestamp to Date converter.
How to use the Date to Unix Timestamp tool
- Enter your date to timestamp in the fields above.
- Adjust any slider or type an exact number — the answer updates as you go.
- Copy the result and close the tab. Nothing you entered was sent anywhere.
About the Date to Unix Timestamp tool
Pick a date and time in your local timezone to instantly get the Unix timestamp in seconds and milliseconds, plus the exact ISO 8601 UTC form.
Unix time counts seconds since 1970-01-01 00:00:00 UTC with no timezone attachment — which is exactly why storing timezone-naive local times in an API is the perennial bug this converter helps you avoid.
Everything runs locally in your browser: no data is uploaded, no account is needed, and it works offline once the page has loaded.
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