Local browser utility

Unix Timestamp Converter

Convert a Unix timestamp in seconds to a readable date — or a date and time back to a timestamp — with ISO, UTC, and local displays and a "now" shortcut.

Both directionsSeconds, milliseconds and dates
100% privateAll processing happens in your browser
Free to useNo sign up required

Your timezone: detecting…

Unix timestamp

Enter a Unix timestamp in seconds or milliseconds (10 or 13 digits).Input unit

ResultReadable date and time for the provided timestamp.

Enter a Unix timestamp to see it as a readable date.

Calculated locally in your browser No data is sent to any server

Questions About This Tool

What is the Unix epoch?

It is 1970-01-01 00:00:00 UTC, the zero reference for Unix timestamps.

How does auto-detection work?

Values with an absolute magnitude of at least one trillion are treated as milliseconds; smaller values are treated as seconds. Select a unit for ambiguous historical values.

Does a Unix timestamp contain a timezone?

No. It represents an instant. UTC or local formatting determines the displayed clock time.

Are dates before 1970 supported?

Yes, negative seconds can be converted when they remain inside the JavaScript Date range.