Convert Unix epoch timestamps to human-readable dates and vice versa. Supports seconds, milliseconds, multiple timezones, batch conversion, and all standard date formats. 100% client-side — your data never leaves your browser.
Current Unix Timestamp
Current Time in Different Formats
Epoch Timestamp → Human Date
Enter an epoch timestamp above to see the conversion...
Human Date → Epoch Timestamp
Set a date above to get the epoch timestamp...
Batch Conversion
Convert multiple timestamps at once (one per line)
The Unix epoch (also known as epoch time, POSIX time, or Unix timestamp) is a system for describing a point in time. It is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC, not counting leap seconds. This date is known as the Unix epoch.
Epoch timestamps are used universally in computing because they are timezone-independent, easy to store as a single number, simple to compare, and supported by virtually every programming language and database system. APIs, log files, databases, and operating systems all use epoch time extensively.
Modern systems typically use 64-bit integers for timestamps, allowing representation of dates far beyond the year 2038 issue that affects 32-bit systems. Millisecond-precision timestamps (like JavaScript's Date.now()) use 13 digits, while second-precision timestamps use 10 digits.
Epoch time (also called Unix time, POSIX time, or Unix timestamp) is a system for tracking time as a running total of seconds since the Unix Epoch: January 1, 1970, 00:00:00 UTC. It is timezone-independent and universally used in computing, databases, APIs, and programming languages. For example, the epoch timestamp 1700000000 represents November 14, 2023 at 22:13:20 UTC.
How do I convert epoch time to a human-readable date?▼
To convert an epoch timestamp to a human-readable date, multiply the epoch value by 1000 (if in seconds) to get milliseconds, then create a Date object. In JavaScript: new Date(epoch * 1000). In Python: datetime.fromtimestamp(epoch). In PHP: date('Y-m-d H:i:s', epoch). You can also use this online epoch converter tool which supports multiple output formats including ISO 8601, RFC 2822, and locale-specific formats across all timezones.
What is the Year 2038 problem (Y2K38)?▼
The Year 2038 problem (Y2K38) occurs because many older computer systems store Unix timestamps as 32-bit signed integers. The maximum value for a 32-bit signed integer is 2,147,483,647, which corresponds to January 19, 2038 at 03:14:07 UTC. After this moment, the timestamp overflows and wraps to a negative number, potentially causing systems to interpret the date as December 13, 1901. Most modern 64-bit systems are not affected, as 64-bit timestamps can represent dates billions of years into the future.
What is the difference between epoch seconds and milliseconds?▼
Epoch seconds are the standard Unix timestamp counting whole seconds since January 1, 1970 UTC (typically a 10-digit number like 1700000000). Epoch milliseconds include sub-second precision by counting milliseconds instead (a 13-digit number like 1700000000000). JavaScript's Date.now() returns milliseconds, while most other languages (Python, PHP, Bash) return seconds by default. This converter auto-detects which format you're using based on the number of digits.
Why do developers prefer epoch timestamps over formatted dates?▼
Developers prefer epoch timestamps because they are timezone-independent (avoiding daylight savings confusion), easy to store as a single integer, trivial to compare and sort, universally supported across all programming languages and databases, and compact in size. They eliminate ambiguity from date format differences (MM/DD vs DD/MM) and make calculating time differences as simple as subtraction.
Keyboard Shortcuts
Ctrl+Enter Run / Convert Ctrl+Shift+C Copy output Ctrl+L Clear