Convert Unix timestamps to human-readable dates and back when debugging APIs, logs, schedulers, and database values.
Accepts seconds (10 digits) or milliseconds (13 digits). Commas and underscores ignored.
Unix Timestamp Converter goes both ways between epoch timestamps and readable dates, with a Set to Now button and copy buttons on every output format.
A Unix timestamp counts seconds since midnight UTC on 1 January 1970. JavaScript, however, counts milliseconds, which is why a timestamp pasted from a browser is a thousand times larger and lands in the year 55,000 if read as seconds. Ten digits is seconds, thirteen is milliseconds.
The other well-known limit is 2038. A signed 32-bit integer overflows on 19 January 2038, which will break any system still storing timestamps that way. Most modern systems use 64-bit values and are unaffected, but the problem persists in embedded and legacy code.
v1.0