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Unix Timestamp Converter

Unix time measures elapsed seconds or milliseconds since 1970-01-01T00:00:00Z.

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How Unix Timestamp Converter works

Unix time measures elapsed seconds or milliseconds since 1970-01-01T00:00:00Z.

Try an example

0 seconds → 1970-01-01T00:00:00.000Z.

Good to know

ISO input must include an offset. Leap seconds are not represented.

Your privacy

Processing happens on this device for this tool. We do not upload your input, put it in share links or save it to your favourites. Closing this tab discards the working input; downloaded results remain wherever you save them.

When this tool is useful

Use Unix Timestamp Converter when you need a quick, local result and want the rule or limitation visible alongside it.

How to use it

  1. Enter the input using the labels shown.
  2. Run the operation and review the result.
  3. Download or copy the result only after checking it.

Checks before you rely on the result

  • ISO input must include an offset. Leap seconds are not represented.
  • Keep the original input when the operation creates a new copy.
  • Use the related tools below when the next step needs a different format.

This page is maintained with the tool implementation and its deterministic tests. If the result looks wrong, report the issue with a non-sensitive example.

Read the Unix Timestamp Converter instructions

A useful next step

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