Unix Timestamp Converter
Runs on your device. Nothing is sent.Everything happens on your own device. Nothing you type is ever sent anywhere.
Current Unix time
Seconds
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Milliseconds
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ISO 8601 (UTC)
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Convert Unix epoch timestamps to human-readable dates and back, with timezone support and a live-ticking clock - entirely in your browser.
A Unix timestamp (or epoch time) counts the seconds that have passed since 1970-01-01T00:00:00 UTC, ignoring leap seconds. It's how most computers, databases, and APIs store a moment in time internally, since a single number is unambiguous and timezone-free - the timezone only matters when you turn it back into a human-readable date. This converter runs the conversion, in either direction, entirely on your device.
Frequently asked questions
What is a Unix timestamp?
It's the number of seconds elapsed since the Unix epoch, 1970-01-01T00:00:00 UTC. A negative timestamp represents a moment before that date. It's the standard way most systems store dates internally because it's a single, timezone-independent number.
Why do some timestamps have 13 digits instead of 10?
A 10-digit number is almost always seconds; a 13-digit number is the same value in milliseconds (JavaScript's Date.now() and many APIs use milliseconds). This tool detects which one you've pasted automatically from its length, and you can override it if it guesses wrong.
How does the timezone conversion handle daylight saving time?
It reads the actual time zone database for the exact instant you're converting, so a date in spring converts using standard time and a date in summer uses daylight time automatically - and the offset flips at the correct moment on the transition day itself.
Does this tool send my dates or timestamps anywhere?
No. Every conversion - timestamp to date, date to timestamp, and the live clock - runs with your browser's own built-in date and time APIs. Nothing is ever uploaded.
Can I convert a date before 1970?
Yes. Unix time simply goes negative for anything before 1970-01-01T00:00:00 UTC, and this tool supports negative timestamps in both directions.
For developers: open this page with a `q` parameter in the URL - e.g. gizke.com/timestamp?q=1700000000 - and that value is pre-filled automatically. Most visitors won't need this; it's meant for linking directly to a ready-to-use example.