Unix Timestamp Guide
Understand Unix epoch timestamps — conversion, relative time, and seconds vs milliseconds.
A Unix timestamp counts the number of seconds since January 1, 1970 00:00:00 UTC (the "Unix epoch"). It is the standard way programming languages and databases store time internally.
Seconds vs milliseconds
Most systems use seconds (10 digits, e.g. 1700000000). JavaScript and some APIs use milliseconds (13 digits). Utiliio auto-detects the format and shows which was used.
Timestamp workbench features
- Relative time badge — "3 days ago" or "in 2 hours"
- Local, ISO 8601, and UTC output formats
- Timestamp → Date and Date → Timestamp tabs
- Use current time with one click
Common use cases
- Debugging API responses and JWT exp claims
- Database query filters by date range
- Cache expiration and TTL values
- Log file timestamp interpretation