What Unix time is
Unix (epoch) time counts whole seconds since 1970-01-01T00:00:00Z, ignoring leap seconds. It is the most common timestamp format in logs, APIs, and databases because it is a single comparable number with no timezone attached.
Unix Timestamp Converter
Convert Unix epoch seconds to and from human-readable dates directly in your browser, with live timezone rows and no upload.
English
Pinned time zones
UTC
Converted locally. Nothing is uploaded.Time · Epoch
Seconds vs milliseconds
A 10-digit number is almost always seconds; a 13-digit number is almost always milliseconds. This converter detects the unit from magnitude and flags the value when it sits close to that boundary.
Frequently asked questions
The Year 2038 problem affects systems that store epoch seconds in a signed 32-bit integer, which overflows at 2038-01-19T03:14:07Z. This tool uses JavaScript's Date, which stores milliseconds in a 64-bit float and is unaffected — it represents dates for roughly ±273,790 years.