| Raw Input | Epoch (Sec) | UTC Time | Local Browser Time | Status |
|---|---|---|---|---|
| Enter timestamps above and click "Convert All" | ||||
Frequently Asked Questions
Learn how Unix timestamps, milliseconds parsing, ISO 8601 strings, and 64-bit epoch rollover work.
What is a Unix epoch timestamp?
A Unix timestamp (or POSIX time) represents the total number of seconds that have elapsed since the Unix epoch: 00:00:00 UTC on Thursday, 1 January 1970 (excluding leap seconds). It is the universal standard for timestamping in computer operating systems, databases, and APIs.
What is the difference between second and millisecond timestamps?
Standard Unix timestamps are 10 digits long and measured in seconds (e.g., 1700000000). JavaScript timestamps and high-precision system logs are 13 digits long and measured in milliseconds (e.g., 1700000000000). This converter automatically detects whether your input is in seconds, milliseconds, or microseconds.
What is the Year 2038 Problem (Y2038)?
The Year 2038 Problem affects systems that store Unix timestamps as a signed 32-bit integer. At 03:14:07 UTC on 19 January 2038, the integer overflows into negative numbers (-2,147,483,648), resetting clocks to 13 December 1901. Modern 64-bit systems resolve this completely, extending epoch timestamp support for billions of years.
Does this tool convert timestamps in local time or UTC?
The converter displays both simultaneously: the exact UTC time string, your browser's local timezone representation, and standard ISO 8601 / RFC 2822 formatted strings for easy copying into software logs or code.