Date and time

ISO 8601 to Timestamp Converter

ISO 8601 dates are common in APIs, logs, databases, and JavaScript apps. Converting them to Unix timestamps helps compare events, debug integrations, and prepare values for systems that expect epoch time.

Use the free Timestamp Converter

Start with a full ISO string

A full ISO value usually includes a date, time, and timezone marker, such as a trailing Z for UTC. Including the timezone makes the conversion less ambiguous.

Check seconds and milliseconds

Some systems expect Unix seconds while JavaScript often uses milliseconds. After converting an ISO date, compare both values before pasting the result into another tool or API.

Verify local time separately

UTC is best for backend systems, but local time is easier to reason about when checking schedules, support tickets, or analytics events.

FAQ

What does the Z mean in an ISO date?

A trailing Z means the time is in UTC.

Can I convert an ISO date without a timezone?

Your browser may parse it using local-time assumptions, so a timezone marker is safer.

Why do APIs use ISO dates?

ISO 8601 is readable, sortable, and widely supported across programming languages and databases.