Convert
Epoch to Date
Wrap long lines in the input and output
Unix timestamp
Paste a Unix timestamp in seconds. A 13-digit value is read as milliseconds.
UTC date
Convert
Paste a Unix timestamp in seconds. A 13-digit value is read as milliseconds.
Epoch to Date turns a Unix timestamp into a UTC clock time. Paste a whole number of seconds since 1970-01-01 and the output is YYYY-MM-DD HH:mm:ss UTC. For example, 1791072000 becomes 2026-10-04 00:00:00 UTC.
Milliseconds reads and writes milliseconds since the epoch. With that option off, a value whose absolute size is at least 100000000000 is still read as milliseconds, which is how a 13-digit timestamp is written. Smaller values are seconds.
Conversion runs in your browser and the timestamp you paste is never uploaded. Swap sends the date to Date to Epoch so you can check the round trip.
It turns a Unix timestamp into a UTC date and time written as YYYY-MM-DD HH:mm:ss UTC. A whole number of seconds is the default. With Milliseconds on, the same field is milliseconds.
When Milliseconds is on, every value is milliseconds. When it is off, a value is still read as milliseconds if its absolute value is at least 100000000000. Smaller values are seconds.
The field must be a whole number, with an optional leading minus. Decimals, commas and words are rejected, and so is a number outside the range a JavaScript date can represent. The note says Invalid timestamp.
No. Conversion runs in your browser and the timestamp you paste is never uploaded or logged. Google Analytics records page views and feature use, never content.
Convert a UTC date, a calendar day or an ISO-8601 time into a Unix timestamp. Runs in your browser; your text is never uploaded.
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