// Time
Epoch Converter online
Convert Unix timestamps to readable dates - milliseconds supported
by
CHUNKY
MUNSTER
MUNSTER
Epoch Converter is an essential tool for developers working with Unix epoch time, which begins at 00:00:00 UTC on Thursday, 1 January 1970. An epoch timestamp is the number of seconds (or milliseconds) elapsed since that moment. This converter translates between epoch integers and human-readable dates in both directions, supporting second and millisecond precision.
A 10-digit number like 1700000000 is a second-precision Unix timestamp. A 13-digit number like 1700000000000 is millisecond-precision - common in JavaScript (Date.now()), Java (System.currentTimeMillis()), and most REST APIs. Microsecond timestamps (16 digits) appear in high-performance logging and profiling tools. The tool auto-detects the precision from the digit count, making it a versatile seconds to date converter.
On 32-bit signed integers: 2,147,483,647 seconds = 19 January 2038, 03:14:07 UTC (the Year 2038 problem). JavaScript uses 64-bit floating point, so this tool correctly handles dates well beyond 2038.
UTC (Coordinated Universal Time) is the primary time standard. Unix timestamps are always in UTC - they count seconds from the 1970-01-01 00:00:00 UTC moment regardless of your local timezone. Your local date/time is derived from UTC by adding the timezone offset.
JavaScript: Date.now() (ms) or Math.floor(Date.now()/1000) (seconds). Python: import time; time.time(). Unix shell: date +%s. PHP: time().
An epoch is a reference point - the moment from which a clock starts counting. The Unix epoch (1970-01-01 00:00:00 UTC) is the most common, but other systems use different epochs: Windows FILETIME starts from 1601-01-01; NTP from 1900-01-01; GPS from 1980-01-06.
For more date handling, check out our milliseconds to date features, the Date Calculator, and the World Clock. Bookmark this page whenever you need a reliable Epoch Converter.