How do I convert a Unix timestamp to a human-readable date?

Simply enter the Unix timestamp (in seconds) into the Timestamp → Date section above and click Convert. The tool will display the equivalent date and time in UTC, your local timezone, and ISO 8601 format. You can also use programming functions: in JavaScript use new Date(timestamp * 1000), in Python use datetime.fromtimestamp(timestamp), and in PHP use date('Y-m-d H:i:s', timestamp).

What is the difference between seconds and milliseconds in Unix time?

Standard Unix timestamps count elapsed seconds since the Epoch. However, many programming environments — especially JavaScript — use milliseconds (ms), which are 1000× larger. For example, the timestamp 1700000000 in seconds equals 1700000000000 in milliseconds. Always check which unit your system expects, as mixing them up is a common source of bugs.

What is the Year 2038 problem?

The Year 2038 problem (Y2K38) occurs because older 32-bit systems store Unix timestamps as a signed 32-bit integer, which can hold a maximum value of 2,147,483,647 — corresponding to January 19, 2038, 03:14:07 UTC. After this point, the counter overflows and rolls back to a negative number, potentially causing system failures. Modern 64-bit systems are not affected, as they can represent timestamps far into the future.

Why do APIs and databases use Unix timestamps?

Unix timestamps are the preferred format in APIs and databases because they are timezone-neutral (always UTC-based), compact (a single integer), easy to sort and compare, language-agnostic, and unambiguous across locales. Unlike human-readable formats such as '03/04/2025' (which differs between US and EU conventions), a Unix timestamp always represents exactly the same moment in time regardless of server or client location.

Unix Timestamp Converter — Epoch to Date Online

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Unix Timestamp Converter

Current Unix Timestamp

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Timestamp → Date

Unix Timestamp (seconds)

Date → Timestamp

Select Date & Time

Frequently Asked Questions

A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC — known as the Unix Epoch. It provides a universal, timezone-independent way to represent points in time, which is why it is widely used in programming, databases, APIs, and log files.

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