Current Unix time (seconds)
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Timestamp to date
Paste a Unix timestamp in seconds or milliseconds. The unit is detected automatically and you can override it above.
Date to timestamp
Use the picker for local time, or the text field for ISO strings with an explicit timezone offset.
Frequently asked questions
What is Unix time?
Unix time counts the seconds elapsed since midnight UTC on January 1, 1970, called the epoch. It is a single timezone-free number, which makes it the standard way databases, APIs, and log files store moments in time. This converter turns that number into a readable date and back again, entirely in your browser.
How do I tell seconds from milliseconds?
Count the digits. Current timestamps in seconds have 10 digits, while millisecond timestamps have 13. The tool auto-detects the unit by magnitude: anything at or above 100 billion is treated as milliseconds. If a historic or far-future value is detected wrongly, use the seconds and milliseconds toggle to override it.
How are timezones handled?
A Unix timestamp itself has no timezone; it always refers to the same instant everywhere. This converter shows that instant twice: once in your device's local timezone, which is named next to the result, and once in UTC as an ISO 8601 string, so you can compare both readings safely.