Unix Timestamp Converter
Convert a Unix timestamp to a readable date, or a date to a Unix timestamp — both update live as you type.
Your files never leave your device — everything runs in your browser.
Accepts seconds or milliseconds since January 1, 1970 (UTC).
How to Use
- 1Enter a Unix timestamp, or press 'Use current time'.
- 2Or pick a date and time directly using the date field.
- 3The UTC, ISO 8601, and relative time are shown automatically.
Frequently Asked Questions
What is a Unix timestamp?
It's the number of seconds that have passed since January 1, 1970 00:00:00 UTC — a compact, timezone-independent way computers represent a point in time.
Does this tool support milliseconds?
Yes — if you paste a 13-digit number it's treated as milliseconds; a 10-digit number is treated as seconds, automatically detected by length.