Local timestamp / privacy-first
Convert Unix timestamps locally.
Detect seconds or milliseconds, show UTC and browser-local dates, and convert dates back to timestamps. Nothing is uploaded or saved.
Enter a date or timestamp
Unix timestamps have no timezone. Local output depends on your browser timezone.
Result
What is covered
- Detect 0, seconds, and milliseconds, and show both units.
- Separate UTC and browser-local input; invalid values never count as success.
- Conversion, copy, and download stay in this browser.