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Unix Timestamp Converter
Turn a Unix timestamp into a readable date, or a date into a timestamp. Seconds and milliseconds are detected automatically, and the result is given in local time, ISO 8601 and UTC so there is no ambiguity.
How to use it
- Paste a timestamp and press Convert to date, or type a date and press Convert to timestamp.
- Use now fills both fields with the current time.
- Dates are read as
YYYY-MM-DD HH:MM:SSin your local timezone.
Why it stays private
Timestamps appear constantly in logs, which are among the more revealing artefacts a system produces. Converting them in a local page means no log line has to be handed over to be read.
Questions
What is a Unix timestamp?
The number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970, ignoring leap seconds. It is the standard way computers record an instant in time, precisely because it carries no timezone ambiguity.
Is my timestamp in seconds or milliseconds?
You do not need to know — the tool detects it. Anything with an absolute value below 10^11 is treated as seconds and multiplied by 1000. In practice this correctly separates current-era seconds from milliseconds.
Which timezone does the local output use?
Whatever timezone your computer is set to. For anything that will be compared across machines, use the ISO 8601 or UTC line, since those include an explicit offset.