Unix Timestamp Converter
Convert Unix epoch timestamps to human-readable dates and back, in your local time zone and UTC — seconds or milliseconds.
About the Unix Timestamp Converter
This Unix timestamp converter (epoch converter) translates machine time into human time and back. At the top you get the current Unix timestamp ticking live every second, with one-click copy. Paste any epoch timestamp to see it as local time, UTC, ISO 8601 and a relative phrase like "3 hours ago" — or pick a date and time to get its timestamp in both seconds and milliseconds.
Unix time counts the seconds elapsed since 00:00:00 UTC on 1 January 1970, the "Unix epoch", ignoring leap seconds. It is the standard clock of computing: databases, APIs, log files, JWTs and programming languages all exchange moments in time as epoch values because a single number is unambiguous across every time zone.
The converter auto-detects whether your input is in seconds (10 digits for current dates) or milliseconds (13 digits), a constant source of confusion between languages — JavaScript's Date.now() returns milliseconds while most APIs and PHP's time() use seconds. Developers use this page daily for debugging logs, checking token expiry times and crafting API queries.
How to Use the Unix Timestamp Converter
- 1Copy the live current Unix timestamp at the top if that's all you need.
- 2Paste any timestamp — seconds or milliseconds are detected automatically.
- 3Read the result as local time, UTC, ISO 8601 and relative time.
- 4Or pick a date and time to get its Unix timestamp in seconds and milliseconds.
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp (epoch time) is the number of seconds elapsed since 00:00:00 UTC on 1 January 1970. For example, 1752480000 corresponds to July 2025. It is time-zone independent — the same number represents the same instant everywhere — which is why databases, APIs and log files use it universally.
How do I convert a timestamp to a date?
Paste the number into the "Timestamp to date" field. The converter instantly shows the moment in your local time zone, in UTC, in ISO 8601 format and as relative time such as "2 days ago". It handles both positive timestamps and dates before 1970, which are represented by negative values.
How do I know if my timestamp is in seconds or milliseconds?
Count the digits: current dates are 10 digits in seconds (1752480000) and 13 digits in milliseconds (1752480000000). This tool auto-detects by treating values of a trillion or more as milliseconds. JavaScript's Date.now() gives milliseconds; Unix time(), PHP and most REST APIs use seconds — dividing or multiplying by 1000 converts between them.
What is the year 2038 problem?
Systems storing Unix time in a signed 32-bit integer overflow on 19 January 2038 at 03:14:07 UTC, when the count exceeds 2,147,483,647 — timestamps would wrap around to 1901. Modern 64-bit systems, databases and languages are unaffected, but embedded devices and legacy software may still need patching before then.
Does a Unix timestamp change with time zones or DST?
No. The timestamp identifies an absolute instant and is always anchored to UTC; only its human-readable representation changes by zone. 1752480000 is the same moment in Mumbai and New York — it just formats to different local wall-clock times. Daylight saving affects the display, never the number itself.