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Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates. Current timestamp:

Your data stays in your browser — nothing is uploaded to any server.

or try sample data

What is a Unix Timestamp?

A Unix timestamp (also called Epoch time or POSIX time) counts the number of seconds since January 1, 1970, 00:00:00 UTC. It is widely used in programming, databases, APIs, and log files as a compact, timezone-independent way to represent a point in time.

  • Bidirectional — convert timestamps to dates and dates to timestamps.
  • Seconds & milliseconds — supports both common Unix timestamp formats.
  • Current timestamp — shows a live-updating current Unix timestamp.
  • Multiple formats — outputs UTC, local time, ISO 8601, and relative time.
  • Privacy-first — all conversion happens in your browser.

Frequently Asked Questions

How do I convert a Unix timestamp online?

Enter a Unix timestamp (number) to convert it to a human-readable date, or enter a date to convert it to a Unix timestamp. The tool supports both seconds and milliseconds formats and shows the result in your local timezone and UTC.

What is a Unix timestamp?

A Unix timestamp (also called Epoch time or POSIX time) is the number of seconds that have elapsed since January 1, 1970, at 00:00:00 UTC. It's a standard way to represent time in computing, used by databases, APIs, log files, and most programming languages.

Is my data private when using this timestamp tool?

Yes. All conversions happen entirely in your browser using JavaScript's built-in Date object. No data is sent to any server.

What is the difference between seconds and milliseconds timestamps?

A Unix timestamp in seconds is typically 10 digits (e.g., 1709472000), while a millisecond timestamp is 13 digits (e.g., 1709472000000). JavaScript, Java, and many APIs use milliseconds. Unix/Linux systems, Python, and PHP typically use seconds. This tool auto-detects the format based on the number of digits.

How do timezones work with Unix timestamps?

Unix timestamps are always in UTC — they represent the same instant in time regardless of timezone. When converting to a human-readable date, the result depends on your local timezone. This tool shows both your local time and UTC so you can see both representations.

What is the current Unix timestamp?

The tool displays the current Unix timestamp in real time at the top of the page, updating every second. This is useful for debugging, setting token expiration times, and comparing timestamps in log files.