Convert
Date to Epoch
Wrap long lines in the input and output
Date
Paste a UTC date, a YYYY-MM-DD day, or an ISO-8601 time.
Unix timestamp
Convert
Paste a UTC date, a YYYY-MM-DD day, or an ISO-8601 time.
Date to Epoch turns a date into a Unix timestamp. It accepts the clock time this tool prints (YYYY-MM-DD HH:mm:ss UTC), a calendar day YYYY-MM-DD at midnight UTC, and an ISO-8601 string such as 2026-10-04T00:00:00Z.
The result is whole seconds since 1970-01-01. Turn on Milliseconds to write the same instant in milliseconds. A time with Z or a numeric offset keeps that instant. A time with no zone follows JavaScript ISO reading. A day that does not exist, such as 2026-02-31, is rejected.
Conversion runs in your browser and the date you paste is never uploaded. Swap sends the timestamp back to Epoch to Date.
The form this tool prints, YYYY-MM-DD HH:mm:ss UTC, a date-only YYYY-MM-DD at midnight UTC, and an ISO-8601 string such as 2026-10-04T00:00:00Z.
Off, the output is whole seconds since the Unix epoch. On, it is milliseconds for the same instant. 2026-10-04 00:00:00 UTC is 1791072000 seconds and 1791072000000 milliseconds.
The text was not one of the accepted forms, or the calendar day does not exist (for example 2026-02-31). The note says Invalid date.
No. Conversion runs in your browser and the date you paste is never uploaded or logged. Google Analytics records page views and feature use, never content.
Convert a Unix timestamp in seconds or milliseconds into a UTC date and time as you type. Runs in your browser; your text is never uploaded.
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