Epoch / Unix Timestamp Converter
Convert a Unix timestamp (seconds or milliseconds) into a readable date, or turn any date & time into a Unix timestamp. Shows UTC and your local time, live.
UTC: —
Local: —
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Epoch / Unix Timestamp Converter
An epoch converter (also called a Unix timestamp converter) translates between the single integer computers use to store time and the human-readable date you actually read. A Unix timestamp is the number of seconds since 00:00:00 UTC on 1 January 1970 (the "Unix epoch").
Numbrary converts both directions, live: type a timestamp and watch it become a date, or pick a date and time and see its timestamp instantly. Toggle milliseconds for high-precision values, and the result always shows both UTC and your local time zone, plus the ISO 8601 string.
Everything runs in your browser — nothing is uploaded. Use it for debugging logs, reading API responses, converting database times, or checking "what date is timestamp 1609459200?"
Frequently Asked Questions
What is a Unix timestamp?
It is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970, the Unix epoch. It is a compact, timezone-neutral way to store time that works the same on every system.
How do I convert a timestamp to a date?
Type the number into the timestamp field. Numbrary multiplies it by 1000 to get milliseconds, builds a JavaScript Date, and displays the result as both a UTC string and your local time, plus an ISO 8601 value.
What is the difference between seconds and milliseconds?
Many systems (especially JavaScript and some APIs) store time in milliseconds. If your value looks roughly 1000x too large, tick "Input is in milliseconds" and the converter divides by 1000 before converting.
Why does it show two different times?
The same instant is shown in UTC (the universal reference) and in your device's local time zone. They differ by your UTC offset — for example, UTC 12:00 is 07:00 in a UTC-5 zone. Both represent the exact same moment.
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