Free online Unix timestamp converter -- convert between epoch time and human-readable dates
Privacy-first
All conversion happens locally
Real-time
Live-updating current timestamp
Bidirectional
Epoch to date & date to epoch
Enter a Unix timestamp to convert
Enter a date to convert to epoch
A Unix timestamp, also known as epoch time, is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC (the Unix epoch). It is widely used in computing to represent dates and times as a single integer, making it easy to store, compare, and transfer time data across systems.
Unix timestamps are traditionally measured in seconds since the epoch. However, many programming languages and APIs (like JavaScript's Date.now()) use milliseconds for greater precision. A millisecond timestamp is simply the seconds timestamp multiplied by 1000. This tool detects and handles both formats automatically.
The Year 2038 problem occurs because many systems store Unix timestamps as 32-bit signed integers, which can only represent dates up to January 19, 2038 (2,147,483,647 seconds). After that, the counter overflows and wraps to a negative number. Modern 64-bit systems are not affected by this limitation.
ISO 8601 is an international standard for date and time representation. It uses the format YYYY-MM-DDTHH:mm:ss.sssZ, where T separates the date and time, and Z indicates UTC. It is the most common format for data exchange in APIs and is unambiguous across locales.
Yes, all conversions happen entirely in your browser using the native JavaScript Date API. No data is sent to any server. Your timestamps and dates never leave your device.
A Unix timestamp, also known as epoch time, is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC (the Unix epoch). It is widely used in computing to represent dates and times as a single integer, making it easy to store, compare, and transfer time data across systems.
Unix timestamps are traditionally measured in seconds since the epoch. However, many programming languages and APIs (like JavaScript's Date.now()) use milliseconds for greater precision. A millisecond timestamp is simply the seconds timestamp multiplied by 1000. This tool detects and handles both formats automatically.
The Year 2038 problem occurs because many systems store Unix timestamps as 32-bit signed integers, which can only represent dates up to January 19, 2038 (2,147,483,647 seconds). After that, the counter overflows and wraps to a negative number. Modern 64-bit systems are not affected by this limitation.
ISO 8601 is an international standard for date and time representation. It uses the format YYYY-MM-DDTHH:mm:ss.sssZ, where T separates the date and time, and Z indicates UTC. It is the most common format for data exchange in APIs and is unambiguous across locales.
Yes, all conversions happen entirely in your browser using the native JavaScript Date API. No data is sent to any server. Your timestamps and dates never leave your device.