Epoch converter
Free online epoch converter. Convert Unix timestamp to date and date to timestamp, with ISO 8601, UTC and relative time formats.
How it works
- 1
Choose the conversion direction
Select Timestamp → Date to transform a Unix number into a readable date, or Date → Timestamp for the reverse process.
- 2
Enter the value
If converting a timestamp, paste the number (in seconds or milliseconds, auto-detected); if converting a date, pick it from the calendar.
- 3
Read all the formats
The tool shows local date, ISO 8601, UTC, day of the week and relative time, or the timestamp in both seconds and milliseconds.
FAQ
What is a Unix timestamp?
It's the number of seconds elapsed since January 1, 1970 (Unix epoch). For example, timestamp 1609459200 corresponds to January 1, 2021.
What's the difference between seconds and milliseconds?
Timestamp in seconds has 10 digits, in milliseconds has 13 digits. JavaScript uses milliseconds, most servers use seconds. The tool distinguishes them automatically.
Does the timestamp account for time zones?
Unix timestamp is always in UTC. The local date conversion accounts for your browser's time zone.
