What is a Unix timestamp?

A Unix timestamp is the number of seconds (or milliseconds) that have elapsed since January 1, 1970 00:00:00 UTC (the Unix epoch). It's used universally in programming for storing and transmitting dates.

Seconds vs milliseconds?

Most backend systems and APIs use seconds (10 digits, e.g., 1700000000). JavaScript's Date.now() returns milliseconds (13 digits, e.g., 1700000000000). Our tool supports both.

What happens in 2038?

32-bit systems storing timestamps as signed integers will overflow on January 19, 2038 (the 'Year 2038 problem'). 64-bit systems and JavaScript handle dates far beyond this.

What date formats can I enter?

Any format JavaScript's Date constructor accepts: ISO 8601 (2024-01-15T10:30:00Z), RFC 2822, or informal formats like 'January 15, 2024 10:30 AM'.

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Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates. Shows the current timestamp live. Supports seconds and milliseconds.

Current Unix Timestamp

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Timestamp → Date

Digits only. Non-numeric characters are ignored.

Unix Timestamp Converter

Timestamp → Date

Date → Timestamp