Epoch Converter

Convert Unix epoch timestamps to date/time and convert date/time back to epoch quickly.

Epoch converter

Paste seconds, milliseconds, or an ISO date. Converts both ways in this tab.

Anything time-shaped Digits ≤10 are treated as seconds. Longer digit strings as milliseconds. ISO-8601 and locale dates also parse.

Unix epoch is UTC. Local time uses this browser’s timezone.

What Is Epoch Time?

Unix epoch time is the number of seconds (or milliseconds) since 1970-01-01 00:00:00 UTC. It is widely used in logs, APIs, databases, and analytics systems.

Common Mistake To Avoid

The most frequent bug is mixing seconds and milliseconds.
Example: 1715942400 (seconds) vs 1715942400000 (milliseconds).

Where This Is Useful

Reading timestamps from server logs.
Debugging time-related API payloads.
Converting user-facing dates into backend-friendly values.