Free Utility Browser tool

Unix Timestamp Converter

Convert date/time values to Unix seconds, milliseconds, and ISO strings.

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Quick facts

  • Best for
    fast everyday workflows
  • Result
    copy-and-paste output
  • Note
    Runs in your browser with no sign-up required.

About this Tool

Computers count time in total seconds starting from January 1, 1970 (called Unix Timestamp). This tool turns those big numbers into real dates and times, or turns dates into timestamp numbers.

Why people use this tool

  • Translates computer numbers like 1700000000 into human dates instantly.
  • Supports both seconds and milliseconds format.
  • Great for checking log files, server times, and software bug reports.

How to use it

  1. Paste a timestamp number OR choose a calendar date.
  2. Select whether your number is in seconds or milliseconds.
  3. Click 'Convert' to see the converted date and time result.

Frequently Asked Questions

It is a simple number counting total seconds passed since midnight UTC on Jan 1, 1970.

10-digit numbers count seconds, while 13-digit numbers count milliseconds.

Results show standard UTC time as well as your local time zone.