Convert epoch milliseconds to human-readable dates and back. Millisecond precision, UTC and local timezone, live counter, and instant copy.
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An epoch converter is a tool that translates Unix epoch timestamps into human-readable dates and vice versa. The Unix epoch is the number of seconds (or milliseconds) that have elapsed since January 1, 1970 00:00:00 UTC, which is the reference point used by most programming languages and operating systems to represent time internally. This tool focuses on millisecond precision, which is the format used by JavaScript's Date.now(), Java's System.currentTimeMillis(), and many modern APIs that need sub-second accuracy. You can paste any epoch value in milliseconds to see the corresponding date in UTC, your local timezone, and ISO 8601 format, along with a relative description like '3 hours ago.' The reverse conversion lets you pick a date and time to get the epoch value in both milliseconds and seconds. A live ticking counter shows the current epoch in real time, and a quick reference table lists common epoch milestones like the Unix epoch origin, Y2K, and the Y2K38 overflow bug date. All conversions happen entirely in your browser with zero server interaction.
Paste an epoch value in milliseconds into the input field or click Now to use the current timestamp. The tool instantly shows the date in UTC, your local timezone, ISO 8601 format, and as a relative time description. Both seconds and milliseconds epoch values are displayed.
Use the date-time picker to select a specific date and time, or click Now to fill in the current moment. The tool outputs the corresponding epoch in milliseconds and seconds, plus the ISO 8601 representation.
Click any value in the quick reference table to load common epoch milestones like the Unix origin, Y2K, or Y2K38 bug. Every output field has a copy button for one-click clipboard access.
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