Unix Timestamp Converter
Translate machine-friendly Unix time into UTC and local dates, or convert a calendar date back to seconds and milliseconds.
What is this tool?
A Unix timestamp counts elapsed time since 1 January 1970 at 00:00:00 UTC. Systems commonly store that count in seconds or milliseconds.
How to use
- Enter a timestamp and select its unit.
- Convert it to see UTC and local output.
- Or choose a local date and convert it back.
- Use Current time for a live reference.
Example
0 seconds represents 1970-01-01T00:00:00.000Z.
FAQ
How do I spot milliseconds?
Modern millisecond timestamps usually have 13 digits; second timestamps usually have 10.
Why does local time differ?
The browser applies your device's timezone and daylight-saving rules.
Does Unix time include a timezone?
No. It represents a single UTC instant; timezone only affects display.