Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable dates and back, in seconds or milliseconds, with UTC, local, and ISO 8601 output. Live, in your browser.
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About this tool
Unix Timestamp Converter — The Unix Timestamp Converter translates between Unix epoch time (the number of seconds since January 1, 1970 UTC) and ordinary calendar dates. It detects seconds versus milliseconds automatically and shows the result in UTC, your local time zone, and ISO 8601 format. A live clock shows the current epoch second so you can grab it with one click.
Unix time is the standard way servers, databases, logs, and APIs store moments in time, because it is unambiguous and easy to compare. Everything here is computed in your browser with the built-in date engine, so no data leaves your device.
How to use it
- To read a timestamp, paste the epoch value into the timestamp field.
- To get a timestamp, pick a date and time in the date field.
- Copy the seconds, milliseconds, or formatted date you need.
Frequently Asked Questions
Seconds or milliseconds?+
Unix time is usually measured in seconds, but JavaScript and some systems use milliseconds. The converter detects which you pasted by its length and handles both.
Which time zone is used?+
The tool shows UTC, your device local time, and ISO 8601 at once, so you can use whichever your context needs.
Is my data sent anywhere?+
No. All conversion happens locally in your browser.