What does this tool do?
The Unix Timestamp tool converts Unix timestamps to readable dates and dates back to timestamps, both ways. It is built for developers, API users, database administrators, and anyone who needs to decode the epoch numbers found in log files.
How to use it
- Enter your values into the fields.
- The result is calculated instantly.
- Read or copy the result.
Live clock, two-way conversion, and relative time
A live counter at the top shows the current Unix timestamp, updating every second, and the 'Use Now' button converts it instantly. Enter any timestamp and you get the result in UTC, local time, and a relative form like '3 hours ago' or 'from now'. In the other direction, pick a date and time to get the matching Unix seconds and milliseconds, with a one-click copy button for the result.
Automatic seconds vs. milliseconds detection
Many systems store timestamps in seconds (10 digits), while JavaScript and some APIs use milliseconds (13 digits). This tool looks at the length of the number you enter: if it is longer than 10 digits it treats the value as milliseconds, otherwise as seconds. That means both 1700000000 and 1700000000000 resolve to the correct date, so you never have to convert by hand.
Frequently asked questions
What exactly is a Unix timestamp?
It is the number of seconds elapsed since 1 January 1970 at 00:00:00 UTC, known as the Unix epoch. Because it is a single number independent of time zones, it is a common way to store and exchange time between systems.
How does it know if my number is in seconds or milliseconds?
The tool checks the length of the number: values longer than 10 digits are treated as milliseconds and shorter ones as seconds. This lets both 10-digit and 13-digit timestamps resolve correctly without any manual adjustment.
What is the difference between UTC and Local in the result?
UTC shows Coordinated Universal Time with no time-zone offset. Local adjusts that to your browser's time zone, so the gap between the two is simply the UTC offset of wherever you are.
Is Unix Timestamp free?
Yes. Unix Timestamp and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. Unix Timestamp works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.