Unix timestamp converter

Convert Unix seconds or milliseconds to readable dates, and dates back to timestamps. Both directions, local and UTC.

Timestamp (seconds or milliseconds)

…or pick a date

What this does

Timestamp → date: paste a Unix timestamp (seconds or milliseconds — the tool detects which by size), or press Now for the current moment. You get the local time and UTC side by side. Date → timestamp: pick a date and time, press convert, and get both the seconds and milliseconds forms.

Notes

The seconds-versus-milliseconds mix-up is the most common timestamp bug in web development — the auto-detection here exists because of how often it bites (the full story in what Unix time is). Your device's timezone settings drive the "local" line; UTC never changes.

Privacy note: every tool on this desk processes your input on your device, in this page — nothing is uploaded, stored or sent anywhere. The same policy the terms and privacy pages promise.

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