Unix Timestamp Converter

Convert Unix timestamps in seconds or milliseconds to UTC, local time, and ISO dates.

Runs locally in your browser. Your input is not uploaded.
Auto-detects seconds or milliseconds
Converted output
Converted dates will appear here.

How to use Timestamp Converter

  1. Paste a Unix timestamp in seconds or milliseconds.
  2. Review UTC, local time, ISO string, and relative age.
  3. Use the current time button to fill the current Unix seconds value, or copy the live seconds and milliseconds shown under the input.

Examples

Copy patterns and edge cases worth checking.

Seconds timestamp

Ten-digit Unix timestamps are usually seconds.

1719600000
2024-06-28T18:40:00.000Z

Milliseconds timestamp

Thirteen-digit values are usually milliseconds.

1719600000000
2024-06-28T18:40:00.000Z

FAQ

Short answers before you paste real data.

Does this send timestamps to a server?

No. The conversion runs in your browser and the input is not uploaded.

How does it detect seconds vs milliseconds?

The tool checks the magnitude of the number. Modern millisecond timestamps are much larger than second timestamps.

Which timezone is local time?

Local time uses the timezone configured in your browser and operating system.

Related tools

Useful next steps that also run locally in your browser.