Timestamp Converter

Convert Unix timestamps and ISO dates locally.

How to use

Is conversion local?

Yes. Date math runs in your browser. Nothing is uploaded.

Seconds or milliseconds?

Numeric values with more than 10 digits are treated as milliseconds; shorter values as seconds.

Which timezone is Local?

Your browser’s current timezone setting.

Why is my date Invalid?

The string could not be parsed by JavaScript’s Date. Prefer ISO-8601 (for example 2024-01-01T00:00:00.000Z).