About Timestamp Tool
Unix timestamp converter converts between timestamp and datetime online, supports millisecond/second timestamps, multiple timezones, batch conversion. Essential for API debugging, log analysis, data processing.
How to Use
- Enter timestamp or datetime
- Choose timestamp unit (second/millisecond)
- Select timezone
- View conversion result
Frequently Asked Questions
- What is a timestamp?
- Unix timestamp is seconds (or milliseconds) from 1970-01-01 00:00:00 UTC to now. Standard format for storing and transmitting time, unaffected by timezone.
- How to distinguish second vs millisecond timestamp?
- 10 digits = second-level (e.g., 1609459200), 13 digits = millisecond-level (e.g., 1609459200000). JavaScript uses milliseconds, most backend languages use seconds.
- Why is my time off by 8 hours?
- Timestamp itself is UTC time. Display requires conversion to local timezone (China is UTC+8). If tool doesn't auto-convert timezone, manually adjust +8 hours.