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Unix timestamp converter
Convert Unix seconds or milliseconds to a UTC date, or a date string to a timestamp.
01Enter your values
Runs in your browser02Unix timestamp converter
Runs in your browser
How it works
Convert Unix seconds or milliseconds to a UTC date, or a date string to a timestamp.
Runs in your browser
Your data stays yours
Inputs are processed on this page and are never sent to a server.
About this tool
Use tool ↑Convert Unix seconds or milliseconds to a UTC date, or a date string to a timestamp.
Convert Unix seconds, milliseconds and dates; dates without a timezone are interpreted as UTC.
How to use it
- Enter your values
Value · From
- Calculate / generate
Convert Unix seconds or milliseconds to a UTC date, or a date string to a timestamp.
- Result
Sunday, September 13, 2026 at 12:00:00 AM UTC 2026-09-13T00:00:00.000Z
Calculation method
Convert Unix seconds, milliseconds and dates; dates without a timezone are interpreted as UTC.
Unix timestamp converter
- Value
- 1789257600
- From
- seconds
Result
Sunday, September 13, 2026 at 12:00:00 AM UTC 2026-09-13T00:00:00.000Z
Frequently asked questions
How should I interpret the result?
Convert Unix seconds, milliseconds and dates; dates without a timezone are interpreted as UTC.
Where does my data go?
Calculations run on your device. Form inputs are not sent to a server.