Epoch / Unix Timestamp Converter
Convert between Unix Epoch timestamps (seconds and milliseconds) and standard human-readable calendar dates. Processes entirely client-side.
Epoch to Human Date
Human Date to Epoch
What is Unix Epoch Time?
Defining the Unix Time System
Unix time (also known as Epoch time or POSIX time) is a system for tracking calendar times by counting the number of elapsed seconds since the **Unix Epoch** (January 1, 1970, at 00:00:00 UTC). It accumulates continuously, ignoring leap seconds. This flat numerical count is extremely useful in computer programming, APIs, and databases for sorting logs and timing session expirations.
Seconds vs. Milliseconds
Many software frameworks handle time in seconds (10-digit Unix timestamp). However, JavaScript and other platform environments execute timestamps at sub-second precision, measuring in milliseconds (13-digit Unix timestamp). Our converter checks the input length to parse both formats.
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