Epoch converter
Unix time, both ways.
Seconds, milliseconds, ISO 8601, and readable UTC. Fast, exact, and explicit about every assumption.
Unix → date
Decode an epoch
Current Unix time
1787468398Auto treats values below 100,000,000,000 as seconds and larger values as milliseconds. Override the unit for early millisecond dates.
Read as seconds.
Seconds
1787416200Milliseconds
1787416200000ISO 8601 · UTC
2026-08-22T16:30:00.000ZReadable UTC
Sat, 22 Aug 2026 16:30:00 GMTDate → Unix
Encode an instant
Include Z or a numeric offset such as +01:00. Nothing is guessed from your device.
Seconds
1787391000Milliseconds
1787391000000ISO 8601 · UTC
2026-08-22T09:30:00.000ZReadable UTC
Sat, 22 Aug 2026 09:30:00 GMT