Convert between epoch time, ISO 8601, and human-readable dates. Supports seconds, ms, and µs.
A Unix timestamp (epoch time) is the number of seconds elapsed since 1970-01-01 00:00:00 UTC. It's the standard time format in Unix/Linux systems, databases, and APIs because it's timezone-independent and easy to do math on.
Standard Unix timestamps use seconds (10 digits, e.g., 1735689600). JavaScript's Date.now() returns milliseconds (13 digits). Some systems use microseconds (16 digits). Hint: a 10-digit number is almost certainly seconds; 13-digit, milliseconds.
The number of seconds (or milliseconds) elapsed since January 1, 1970 UTC — a compact, timezone-independent way to represent a point in time.
Yes — seconds, milliseconds, and microseconds are all supported as input formats, alongside ISO 8601 strings.
Yes — the result can be displayed in any time zone, not just UTC or your local one.
Want more detail? Read How to Use Unix Timestamp Converter: Practical Guide and Best Practices.