Convert Unix timestamps to dates and back, in seconds or milliseconds.
1787006380Seconds or milliseconds — the unit is detected automatically.
ISO 8601, or anything your browser can parse.
Seconds
A ten-digit epoch value
1700000000Milliseconds
Thirteen digits — detected automatically
1700000000000The epoch itself
Where Unix time begins
0Seconds
A ten-digit epoch value
1700000000Milliseconds
Thirteen digits — detected automatically
1700000000000The epoch itself
Where Unix time begins
0Paste an epoch number in either direction, or type a date such as 2026-08-08. Both fields stay in sync.
The tool states whether it read your number as seconds or milliseconds, and you can override it if the guess is wrong.
ISO 8601 for APIs, UTC for logs, local time for humans, and a relative description for quick orientation.
Seconds and milliseconds are detected by magnitude and stated explicitly, which eliminates the most common epoch mistake.
ISO, UTC, local and relative are shown together, so you can copy whichever the system in front of you expects.
Local time reflects your device settings, so the value you see is the one your users in this zone would see.
Convert an epoch timestamp into a readable date, or a date into a timestamp, in both directions at once. The persistent trap with epoch values is unit ambiguity — 1700000000 is seconds while 1700000000000 is milliseconds, and confusing the two produces dates in 1970 or the distant future. This tool detects the unit from the magnitude, tells you which it used, and lets you override it. Results are shown in ISO 8601, UTC, your local time zone, and as a relative description such as "3 months ago".
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