Unix Timestamp Converter
Current Unix timestamp: (updates every second)
Timestamp → Date
Date → Timestamp
Limitations
Timezone offsets for dates far in the past or future rely on your browser's built-in timezone database, which may not reflect historical changes to a region's timezone rules.
Frequently asked questions
- What is a Unix timestamp?
- The number of seconds that have passed since January 1, 1970, 00:00:00 UTC — a single number that represents a moment in time regardless of timezone.
- Seconds or milliseconds — how do I know which I have?
- A 10-digit number (like 1735689600) is usually seconds. A 13-digit number (like 1735689600000) is usually milliseconds. Use the unit selector to switch.
- How does the timezone conversion handle daylight saving time?
- It uses your browser's built-in timezone database (the same one behind Intl.DateTimeFormat), so daylight saving transitions are handled automatically for the date you enter.
- Will this stop working in 2038?
- Not here — this runs on JavaScript numbers, not a 32-bit integer, so it isn't affected by the classic "Year 2038" overflow some older systems have.