Unix Timestamp Converter
A free online tool for converting between Unix timestamps and dates
Current Unix Timestamp
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Current Date/Time
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Timestamp → Date
| ISO 8601 | - | |
| Local Time | - | |
| UTC | - | |
| Relative Time | - |
Date → Timestamp
| Seconds | - | |
| Milliseconds | - | |
| ISO 8601 | - |
Batch Conversion
Conversion results will be displayed here.
What is a Unix Timestamp?
A Unix timestamp (Epoch Time) is a number representing the time elapsed in seconds since January 1, 1970, 00:00:00 UTC. It is the most universal way to represent dates and times in operating systems, databases, and programming languages. Since it represents the same point in time regardless of timezone, it is widely used in internationalized systems.
How to Use
- To convert a timestamp to a date, enter a number in the left area. It automatically detects seconds (10 digits) or milliseconds (13 digits).
- To convert a date to a timestamp, enter year/month/day/hour/minute/second in the right area and click the convert button.
- Use the timezone selector to view results in your desired timezone.
- Use the batch conversion area to convert multiple timestamps at once.
Frequently Asked Questions
On 32-bit systems, it can represent dates from January 1, 1970 to January 19, 2038 (2,147,483,647). This is known as the Y2K38 problem. On 64-bit systems or in JavaScript, this limitation is virtually nonexistent, and timestamps can be expressed with millisecond precision.
A seconds-based timestamp is a 10-digit number (e.g., 1709856000), while a milliseconds-based timestamp is a 13-digit number (e.g., 1709856000000). PHP, Python, MySQL, etc. primarily use seconds, while JavaScript, Java, etc. use milliseconds. This tool automatically detects the unit based on the number of digits in the input.
No. All conversions are processed in the browser using JavaScript, and the entered data is not sent to any external server. You can use it with confidence.
A negative timestamp represents a date before January 1, 1970. For example, -86400 means December 31, 1969. This tool can also convert negative timestamps.