Unix timestamp converter
Convert Unix seconds or milliseconds to UTC and back.
Result
Add your input, then select Convert timestamp.
How to use it
Choose seconds, milliseconds or ISO date input. The result includes an exact UTC timestamp.
What to keep in mind
Date input requires an explicit timezone. Leap seconds are not represented by JavaScript dates.
Up to 2 MB per input, with smaller limits for complex operations. Clear removes the current input and result.
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