Unix Timestamp Converter
Unix Timestamp Converter: Enter a Unix timestamp (seconds or milliseconds) to see the matching UTC and local date, or pick a date and time to get the epoch value. Includes a live clock showing the current epoch. All conversions run in your browser with no server round-trip.
Data as of 2026-06-13.
How it works
A Unix timestamp counts the number of seconds (or milliseconds) elapsed since the Unix epoch, 00:00:00 UTC on 1 January 1970. It is timezone-independent: the same instant has the same epoch value everywhere.
Enter a timestamp to see its UTC, local and ISO 8601 representations plus a relative description; auto-detect treats values below 1,000,000,000,000 as seconds and larger ones as milliseconds. Pick a local date and time to convert the other way. A live clock shows the current epoch second.
Runs fully client-side in your browser. Source: published web standards (RFCs and the WHATWG/W3C specifications), as implemented by your browser. Verified 2026-06-13.
Frequently asked questions
How does auto-detect tell seconds from milliseconds?
Values with an absolute size below 1,000,000,000,000 (one trillion) are treated as seconds; larger values are treated as milliseconds. You can override this by selecting the unit explicitly.
Why do the UTC and local times differ?
UTC is the absolute time, while local time applies your device's timezone offset (and daylight saving rules). The underlying instant is the same; only the display differs.
What is the year-2038 problem?
Systems that store Unix time in a signed 32-bit integer overflow on 19 January 2038. This tool uses JavaScript numbers, which represent timestamps far beyond that, so it is not affected.
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Last updated: 2026-06-13