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Unix Timestamp Converter

Instantly convert Unix timestamps to human-readable dates, and back, right in your browser.

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Unix Timestamp

Date & Time (your browser's local timezone)

Not sure what to enter?

Enter a Unix timestamp or a date below to instantly convert between them - entirely in your browser, nothing is sent to our servers.

What is a Unix timestamp?

A Unix timestamp is the number of seconds since 1 January 1970 00:00:00 UTC. It is how many systems, logs, databases and APIs store time. This converter turns a timestamp into a readable date and a date back into a timestamp, right in your browser.

How to convert a Unix timestamp

Enter a timestamp such as 1700000000 (or click the clock button for the current time).
Click Convert to Date to see it as a readable date and time.
To go the other way, pick a date and time and click Convert to Timestamp.
A 13-digit value is in milliseconds - divide it by 1000 for seconds.

Related checks

JWT expiry (exp) values are Unix timestamps - decode one with the JWT Decoder.
To tidy JSON that contains timestamps, use the JSON Formatter.

A Unix timestamp counts the seconds that have passed since 1 January 1970 00:00:00 UTC. The converter accepts both seconds (10 digits for current dates) and milliseconds (13 digits, the format JavaScript uses), and shows the matching date in UTC and ISO 8601 format; converting a date back gives both the seconds and milliseconds value. A timestamp has no time zone of its own - the same number refers to the same instant everywhere in the world. JustChecker builds tools that respect your data - this one never leaves your browser.

Frequently Asked Questions

It's the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC (also called "the Unix epoch") - a common, timezone-independent way to store dates and times in code.

Yes - if you paste a timestamp with more than 10 digits, it's automatically treated as milliseconds instead of seconds.

No - this tool runs entirely in your browser using JavaScript. Nothing you enter is transmitted anywhere.

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