Question 1

What is a Unix timestamp?

Accepted Answer

A Unix timestamp is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970 (the Unix epoch). It is widely used in programming, databases, and APIs.

Question 2

Does the tool support millisecond timestamps?

Accepted Answer

Yes. The tool auto-detects seconds vs. milliseconds based on the magnitude of the input. Timestamps above 10,000,000,000 are treated as milliseconds.

Question 3

What timezone is used for the conversion?

Accepted Answer

The tool shows dates in your local timezone and in UTC simultaneously, so you can see both representations at once.

Question 4

Is anything sent to a server?

Accepted Answer

No. All conversions use the browser's built-in Date object. Nothing is transmitted.

Timestamp Converter

Unixタイムスタンプを日時に変換

日時をUnixタイムスタンプに変換

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