Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates, with live current timestamp display
How to Use
- Select "Timestamp → Date" or "Date → Timestamp" conversion mode
- Enter a Unix timestamp (seconds or milliseconds) or select a date and time
- Click "Convert" to see the result, including the full date, timestamp, and relative time
- Click "Now" to quickly fill in the current time
Notes
- Unix timestamps are in seconds; JavaScript timestamps are in milliseconds. This tool auto-detects and handles both formats
- Conversion results are displayed in your browser's local timezone
- 32-bit systems have a maximum timestamp of 2147483647 (January 19, 2038). Use 64-bit timestamps for dates beyond this range
FAQ
What is a Unix timestamp?
A Unix timestamp is the number of seconds elapsed since January 1, 1970, 00:00:00 UTC (known as the Unix Epoch). It is the most universal time representation in computing, timezone-independent, and convenient for storage and calculation.
What is the difference between seconds and milliseconds timestamps?
Unix timestamps are typically in seconds (10 digits), while JavaScript's Date.now() returns millisecond timestamps (13 digits). Millisecond timestamp = second timestamp × 1000. This tool automatically detects the unit based on the number of digits.
What is the Y2K38 problem?
Y2K38 (the Year 2038 problem) occurs when systems using 32-bit signed integers to store Unix timestamps overflow on January 19, 2038, at 03:14:07 UTC. Modern 64-bit systems have resolved this issue and can handle dates billions of years into the future.
How does the timestamp handle timezones?
Unix timestamps contain no timezone information — they are always based on UTC. Timezone offset is only applied when converting to a human-readable date. This tool displays results in your browser's local timezone; you can convert to other timezones as needed.