Convert Unix epoch values to readable dates and turn local or UTC date-time values back into timestamps.
Convert Unix timestamps in seconds or milliseconds to UTC, local and ISO dates, or convert a date-time back into epoch values.
Unix time represents an instant as elapsed time relative to 1970-01-01T00:00:00Z. It is widely used in operating systems, application logs, databases and APIs because the numeric value itself is not a local wall-clock timezone.
Toolmera shows the same parsed instant as UTC, your browser-local time and ISO 8601.
Many systems store Unix timestamps in seconds, while JavaScript Date.now() returns milliseconds. Toolmera can auto-detect the likely unit by numeric magnitude, and a manual selector is available when you already know the source format.
Both seconds and milliseconds are also shown when converting a calendar date back to epoch time.
Local mode interprets the date-time picker using the browser’s current timezone rules. UTC mode treats the entered calendar fields as UTC.
Daylight-saving behavior for local mode follows the timezone information available to the browser and operating system.
Open the tool and select the mode or options that match your task.
Provide the inputs required for the result.
Check the calculation, assumptions and supporting output shown by Toolmera.
Useful next steps in the same workflow.
The Unix epoch starts at 1970-01-01 00:00:00 UTC.
Auto mode uses the numeric magnitude as a practical heuristic, and you can override it with an explicit Seconds or Milliseconds selection.
Yes. Timestamp-to-date output shows UTC, browser-local and ISO 8601 representations.
Yes. Enter a date-time, choose Local time or UTC interpretation, and Toolmera returns seconds and milliseconds.