A well-known epoch
mode = ts-to-datevalue = 1700000000
Result: 2023-11-14 22:13:20 UTC
Unix Timestamp Converter
Turn a Unix timestamp (seconds since 1970-01-01 UTC) into a human-readable date, or a date into a timestamp. Results show UTC and your local timezone, and millisecond timestamps are detected automatically. All conversion is done locally.
Privacy: this tool processes your data entirely in your browser. Nothing you paste or type is sent to the server.
Enter your values and press Calculate — the result appears here.
Worked examples
Millisecond detection
mode = ts-to-datevalue = 1700000000000
Result: Same date — millisecond input detected and divided by 1000.
Date back to timestamp
mode = date-to-tsvalue = 1970-01-01 00:00:00
Result: 0 (UTC)
Frequently asked questions
What exactly is a Unix timestamp?
The number of seconds that have elapsed since 1970-01-01 00:00:00 UTC, ignoring leap seconds. It is how most systems store and transmit instants in time.
How do I know if my number is in milliseconds?
Timestamps are usually seconds (10 digits today) or milliseconds (13 digits). This tool detects millisecond input automatically and shows the correct date either way.
Why does my local time differ from UTC?
A timestamp is an instant, not a wall-clock time. It represents the same moment everywhere — the tool shows it in UTC and in your device’s timezone so you can read it however you need.
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