Date and Time Converter
Convert timestamps and dates between formats and timezones.
Timezone rules come from your browser, so an out-of-date browser may not know a recent change to a country's clocks.
UUID v7 and ULID identifiers contain a timestamp too: the UUID / ULID inspector decodes it.
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What is a Unix timestamp?
Convert Unix timestamps to dates and back, from seconds to nanoseconds, with ISO 8601, timezones and daylight saving handled clearly. Free, in your browser.
A Unix timestamp counts seconds since 1 January 1970 at midnight UTC, ignoring leap seconds. Many systems count milliseconds, microseconds or nanoseconds instead, so the same moment can be 10, 13, 16 or 19 digits long.
Is my timestamp in seconds or milliseconds?
Count the digits. A bare number is read by its length: up to 11 digits as seconds, 12 to 14 as milliseconds, 15 to 17 as microseconds and 18 or more as nanoseconds. The page always says which it chose, and you can change it.
Times without a timezone
2026-10-14 20:30 names a different moment in every timezone, so the tool asks which zone it is in, starting with your device's. Where clocks go back, a local time happens twice and you choose which; where they go forward, it never happens and is shown moved forward by the gap. Abbreviations such as CST and IST are not accepted, because each is used for several zones; use an offset such as +01:00 or a zone name such as Europe/London.
Precision and other epochs
Every digit is kept: a nanosecond timestamp converts without rounding. Excel serial dates, Windows FILETIME and Active Directory values, .NET ticks and Apple Cocoa time are under Other epochs. Their numbers look like Unix times, so they are only used when you choose them from the format menu. Timezone rules come from your browser, and nothing you type leaves this page.