Developer tools
Convert a timestamp
Convert seconds, milliseconds, or ISO 8601 dates to UTC and local time.
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Why use it
Convert timestamps without guessing the unit
- 01
Choose seconds or milliseconds
Select the Unix unit explicitly, or enter an ISO 8601 date to convert it.
- 02
Compare UTC and local time
See the ISO value, UTC time, local browser time and both Unix timestamp units.
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Supported files and limits
- Accepted input
- Unix seconds, Unix milliseconds or ISO 8601
- Time zones
- UTC and this browser's local timezone
- Privacy
- Processed locally in your browser
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How to convert a timestamp
- 1
Choose the input format
Select seconds, milliseconds or ISO 8601.
- 2
Enter a value
Review the converted timestamp, UTC and local time.
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Frequently asked questions
How can I tell seconds from milliseconds?
Choose the matching unit before converting. The tool never guesses based on the number of digits.
Which timezone is used for local time?
Local time uses the timezone configured in your browser or device.