Many APIs and databases prefer Unix timestamps, but humans think in dates and times. The UTC Time to Unix Converter helps you translate a precise UTC moment into the integer number of seconds since 1 January 1970, ready to use in code, configuration, or queries.
UTC (Coordinated Universal Time) is the standard reference time used across the internet. It is often expressed as an ISO 8601 string, for example:
2024-01-02T03:04:05Z2024-01-02T03:04:05.000ZThe trailing Z indicates “Zulu time,” or UTC. The converter on /date-tools/utc-time-to-unix takes such a value and returns the corresponding Unix time in seconds.
/date-tools/utc-time-to-unix.2024-01-02T03:04:05Z.Z suffix.02/01/2024 03:04:05.Some systems let you define:
Those fields may require Unix timestamps. With this tool you can:
When writing tests or scripts, you often want stable timestamps:
Pair this with Unix Time to UTC when you need to convert the other direction.
If others are unfamiliar with ISO 8601 or Unix time, you can:
If you paste a string without a Z suffix or an explicit offset (like +00:00), different environments may interpret it differently:
To avoid ambiguity, always include the Z suffix when working with UTC in this tool.
Formats such as 02/01/2024 03:04:05 are ambiguous (is it February 1 or January 2?) and may be parsed differently across regions. Stick to ISO 8601:
YYYY-MM-DDTHH:MM:SSZThe tool always outputs seconds, not milliseconds. If you copy the value into a field that expects milliseconds, the time will be about 1000 times earlier than expected. In that case, multiply by 1000 manually or use Timestamp Converter, which supports both.
It converts a UTC date and time, typically provided as an ISO 8601 string, into a Unix timestamp measured in whole seconds since 1 January 1970.
Use an ISO 8601 UTC string with a Z suffix, for example 2024-01-02T03:04:05Z. Including the Z ensures the value is treated as UTC rather than local time.
The input is interpreted according to the browser’s parsing rules. If you include Z or an explicit offset like +00:00, it is treated as UTC. If you omit time zone information, the browser may assume local time, which can lead to confusion. The safest option is to always include Z.
No. All parsing and conversion happen in your browser only. The UTC date and time values you enter are never uploaded or stored remotely.
Use it when you have a known UTC moment—for example from documentation, scheduling requirements, or another system—and need a Unix timestamp in seconds for APIs, scripts, or configuration fields.
This usually happens when the input string is malformed, uses a locale-specific format, or omits the time zone. Ensure you are using a full ISO 8601 string such as 2024-01-02T03:04:05Z.
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