FAQ
What is a Unix timestamp?
The number of seconds since 1 January 1970 00:00:00 UTC (the Unix epoch). Many APIs use milliseconds (13 digits) instead of seconds (10 digits).
Seconds or milliseconds?
10 digits ≈ seconds, 13 ≈ milliseconds, 16 ≈ microseconds, 19 ≈ nanoseconds. The converter detects it automatically.