Timestamp Converter
Convert ISO date/time ↔ Unix timestamps. Supports seconds and milliseconds.
Tip: ISO 8601, or any Date() parseable string.
Seconds if < 1e12; otherwise milliseconds.
Enter a valid ISO date/time or timestamp to see conversions.
What is Timestamp Converter?
Converts between human-readable date/time (ISO 8601) and Unix timestamps. If a timestamp is less than 1e12 it’s treated as seconds; otherwise milliseconds.
Example usage
ISO: 2026-03-11T00:00:00.000Z Seconds: 1773187200 Milliseconds: 1773187200000
How to use
1. Enter either an ISO date/time or a timestamp.
2. The other formats are calculated automatically.
3. For timestamps, you can paste seconds or milliseconds.