Unix Timestamp Converter
This page participates in the Coupang Partners program and may earn a commission from qualifying purchases.
Convert between Unix timestamps and dates, and see the local, UTC, and ISO 8601 formats at once.
1787300873Automatically detects seconds or milliseconds.
8/21/2026, 8:27:53 AMFri, 21 Aug 2026 08:27:53 GMT2026-08-21T08:27:53.000Z17873008731787300873000How to use
Enter a timestamp — seconds or milliseconds are detected automatically and converted to a date.
Pick a date/time directly to get both the second- and millisecond-based timestamps.
Click "Use now" to fill in the current time instantly.
Copy the value you need with the button next to it.
Need to count down to a date? Try the D-day Calculator.
자주 묻는 질문
Q1. What is a Unix timestamp?
A Unix timestamp is a number representing the seconds (or milliseconds) elapsed since the epoch — January 1, 1970, 00:00:00 UTC. It lets a single number express a point in time independent of time zone, which is why servers and databases use it so widely.
Q2. How does the tool tell seconds and milliseconds apart?
If the entered number is 10^12 or larger it's treated as milliseconds, otherwise as seconds. JavaScript defaults to milliseconds while most server languages default to seconds, which is a common source of confusion.
Q3. What's the difference between local time and UTC?
Local time follows the time zone set in your browser (for example KST, UTC+9), while UTC is Coordinated Universal Time with no offset applied. Server logs and API responses usually use UTC or ISO 8601.
Q4. Where is the ISO 8601 format used?
It's a standardized format like 2026-08-21T09:00:00.000Z that orders year-month-day and hour:minute:second consistently. REST APIs, log files, and JSON data exchange rely on it to avoid time zone ambiguity.
Q5. Can it convert negative timestamps?
Yes. Negative values, which represent times before January 1, 1970, convert to dates correctly.
댓글
첫 번째 댓글을 남겨보세요!
This page participates in the Coupang Partners program and may earn a commission from qualifying purchases.