Unix Timestamp Converter
Convert Unix time (epoch seconds or milliseconds) to local date, UTC, and ISO 8601. Free timestamp and epoch converter.
Processed locally in your browser.
How to use this unix timestamp converter
Paste a Unix timestamp in seconds or milliseconds. Values with 13 or more digits are treated as milliseconds. You can also type a date and convert the other way.
The result shows epoch seconds, milliseconds, ISO 8601, UTC, your local time, and a relative phrase like “in 3 hours.” Current time is available in one click.
Example
1700000000 is 2023-11-14 22:13:20 UTC. 1700000000000 is the same instant in milliseconds.
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Frequently asked questions
What is a Unix timestamp?
Unix time is the number of seconds (or milliseconds) since 1970-01-01T00:00:00Z, not counting leap seconds in the usual POSIX definition.
Is this an epoch converter?
Yes. Epoch time and Unix timestamp refer to the same counter. This page converts both seconds and milliseconds.
Seconds or milliseconds?
If the number is at least 1e11 in magnitude, it is treated as milliseconds. Otherwise as seconds.
Does conversion use my timezone?
Local time uses your browser timezone. UTC and ISO stay timezone-independent.
Is the timestamp sent to a server?
Processed locally in your browser. We do not upload the text to compute a result.
Last reviewed 2026-08-20. Results stay on your device unless you copy them elsewhere.