Convert Unix timestamps to human-readable dates and back. Supports multiple formats, timezones, and relative time display. 100% client-side.
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A Unix timestamp (also called epoch time or POSIX time) is the number of seconds that have elapsed since January 1, 1970 at 00:00:00 UTC, known as the Unix epoch. This universal time representation is used across programming languages, databases, APIs, and operating systems because it is timezone-independent and easy to compare mathematically. This converter lets you instantly translate between Unix timestamps and human-readable date formats. Paste any timestamp (in seconds or milliseconds) and see the corresponding date in ISO 8601, RFC 2822, and locale-specific formats, along with day of week, day of year, ISO week number, and relative time (e.g. 3 days ago). You can also pick a date and time to get the corresponding Unix timestamp. The tool supports 13 major timezones and auto-detects whether your input is in seconds or milliseconds. Everything runs entirely in your browser with zero server calls.
Enter a Unix timestamp in the input field (seconds or milliseconds are auto-detected). Click the Now button to fill in the current timestamp. The tool instantly displays the date in ISO 8601, RFC 2822, and locale formats, plus day of week, day of year, week number, and relative time.
Use the date/time picker in the lower section to select any date and time. The tool immediately shows the corresponding Unix timestamp in both seconds and milliseconds. Click the copy button next to either value to copy it to your clipboard.
Select a timezone from the dropdown to see the converted date displayed in that timezone. Choose from UTC, your local timezone, or 11 other major world timezones including US/Eastern, Europe/London, Asia/Karachi, Asia/Tokyo, and more.
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