Time
Unix Timestamp Converter
Convert Unix timestamps to UTC and local time, detect seconds versus milliseconds, and create Unix values from a date input.
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Runs locally in your browser. Your input is not uploaded.
How this tool works
Unix timestamps count time since 1970-01-01T00:00:00Z.
Many APIs use seconds, while JavaScript dates commonly use milliseconds, so the page labels both clearly.
Examples
- Convert a JWT exp timestamp into local time.
- Create a Unix millisecond value from a scheduled date.
Common use cases
API debugging
JWT claim inspection
Log analysis
FAQ
How does seconds versus milliseconds detection work?
Shorter values are treated as seconds, while larger epoch values are treated as milliseconds.
Why show UTC and local time?
UTC is consistent across systems, while local time helps compare values to your current timezone.