Unix timestamp converter
Turn a Unix timestamp into a readable date, and back.
A timestamp in a log or a database is a count of seconds since the first of January 1970, and reading one by eye is impossible. This converts it and shows both your own time zone and UTC, because a bug that looks like bad data is often just a five-hour difference.
How to use it
- Paste the number.
- Read the date in your zone and in UTC.
- Copy the ISO form if a system needs it.
Why use this tool
Completely private
Everything runs inside your browser. Your files and text are never sent to a server.
Free, with no limits
No sign-up, no watermarks and no cap on how many times you can use it.
Instant results
There is no upload or queue to wait for, so results appear as fast as your device can work.
Works on any device
Runs in any modern browser on phone, tablet or desktop. Nothing to install.
Frequently asked questions
- Seconds or milliseconds?
- Both are common and a bare number is genuinely ambiguous. Ten digits or fewer is read as seconds, which is correct for any date between 1973 and the year 5138; more than that is read as milliseconds. Which reading was used is stated above the result.
- Why show UTC as well?
- Because servers store UTC and people read local time, and the gap between the two explains a large share of date bugs. Seeing both at once usually settles the question immediately.
- What is the ISO form for?
- It is the unambiguous way to write an instant, and what most APIs and databases want when you hand them a date rather than a number.