What is Epoch & Unix Timestamp Converter?
Free Unix epoch timestamp converter. Convert a Unix timestamp to a human-readable date (local, UTC, ISO 8601) and convert any date back to a timestamp. Auto-detects seconds, milliseconds, and microseconds. No signup.
Epoch Converter runs entirely in your browser using JavaScript (browser). Your data never leaves your device.
Free Epoch & Unix Timestamp Converter
Convert Unix timestamps to human dates and back, instantly. Paste any epoch value and the tool auto-detects whether it is in seconds, milliseconds, or microseconds, then shows the moment in your local timezone, UTC, ISO 8601, the day of the week, and a relative description. A live current-epoch clock ticks at the top, and a date picker converts any calendar date into a timestamp.
Current Unix time
updates live · your local clock
Unix time = seconds since 00:00:00 UTC on 1 January 1970. Everything is computed in your browser.
Frequently Asked Questions
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What Is a Unix Timestamp?
A Unix timestamp (also called epoch time or POSIX time) is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970 — the "Unix epoch". Because it is a single integer with no timezone, locale, or formatting baked in, it is the standard way computers store and exchange moments in time: database rows, log files, JWT iat/exp claims, API responses, and cron schedules all use it.
Seconds vs Milliseconds vs Microseconds
The classic Unix timestamp is in seconds (10 digits today, e.g. 1700000000). JavaScript's Date.now() and most front-end code use milliseconds (13 digits). Some databases and tracing systems use microseconds (16 digits). This converter auto-detects the unit from the magnitude of the number, or you can force seconds, milliseconds, or microseconds with the toggle.
Why Use a Converter Instead of Asking an AI?
A dedicated converter gives you the answer instantly in a pinned tab, shows the live current epoch ticking in real time, renders the result in your local timezone and UTC and ISO 8601 simultaneously, and never round-trips your data to a server. For something you check dozens of times a day while debugging, that is faster and more reliable than re-typing a prompt.
The Year 2038 Problem
Systems that store Unix time in a signed 32-bit integer overflow on 19 January 2038, when the value exceeds 2,147,483,647. Modern systems use 64-bit integers, which push the limit roughly 292 billion years out — so for new code, always store epoch time in a 64-bit type.