A Unix timestamp (also known as a POSIX timestamp) refers to the total number of seconds that have elapsed since 00:00:00 on January 1, 1970, Greenwich Mean Time (GMT). It is a universal way of expressing time in the computer world that does not change with time zones.
This tool provides comprehensive time processing capabilities to meet your needs in various development scenarios:
Enter a number (10 or 13 digits) to instantly convert it to the standard YYYY-MM-DD HH:mm:ss format. Supports automatic timezone detection (defaults to UTC+8, Beijing Time).
Supports quickly converting common date strings (e.g., 2025-12-24 14:00:00) back into a Unix timestamp, making it easy to write to databases or set cache expiration times.
The top of the page provides a real-time ticking "Current Timestamp" and "Current Beijing Time," allowing you to copy the latest data for testing with one click.
For the convenience of developers, here is a reference of code for handling timestamps in commonly used languages:
| Language | Get Second-level Timestamp (10 digits) | Get Millisecond-level Timestamp (13 digits) |
|---|---|---|
| JavaScript | Math.round(new Date() / 1000) |
Date.now() |
| Java | System.currentTimeMillis() / 1000 |
System.currentTimeMillis() |
| Python | import time; int(time.time()) |
int(time.time() * 1000) |
| PHP | time() |
(int)(microtime(true) * 1000) |
| MySQL | UNIX_TIMESTAMP(NOW()) |
(Requires special handling) |
Q: Why does the timestamp I get have 3 extra digits?
A: This is because the data is in millisecond (ms) precision. Typically, Java and JS output 13 digits by default, while PHP and Python output 10 digits by default. This tool automatically recognizes the digit count and converts accurately.
Q: Are timestamps affected by Leap Seconds?
A: Unix timestamps do not account for leap seconds; they assume each day is exactly 86,400 seconds. While this requires attention in extremely high-precision scientific fields, it is negligible for the vast majority of internet applications.
Q: How to handle time conversion for different time zones?
A: The timestamp itself is globally unified (based on UTC). This tool displays the time according to your computer's system settings (usually Beijing Time). If you need to calculate the time for an overseas server, please remember to add the corresponding time difference.