Example: 1609459200
Date-only YYYY-MM-DD uses UTC. Date-times without an offset use your browser’s timezone; the selected timezone only changes display. 2021-01-01T00:00:00Z / 2021-01-01T00:00:00-05:00
Select the input unit before pasting the timestamp: seconds and milliseconds differ by a factor of one thousand. Choose UTC for a reproducible comparison, then inspect the ISO output. The example below converts the start of 2024 from Unix seconds. Copy the representation your API expects rather than inferring units from the number's length alone. Use the date input for the reverse conversion.
Timezone controls affect human readable date representations while the underlying instant stays the same. Browser date parsing and JavaScript number precision can limit unusual dates or very fine units, especially large nanosecond values. Check the batch results individually when converting several lines because one invalid input does not establish that every other line has the same unit. Retain the original values when debugging a timezone or precision discrepancy.
Unit: seconds; timezone: UTC
Input: 1704067200
ISO output: 2024-01-01T00:00:00.000Z
Unix timestamps represent seconds elapsed since January 1, 1970, 00:00:00 UTC. They provide universal time representation across systems, databases, and programming languages, making them essential for consistent time handling in distributed systems and applications.
Our converter supports Unix seconds (standard), milliseconds (JavaScript), microseconds (database precision), and nanoseconds (system level). Each format serves different applications from general use to high-frequency operations and scientific measurements.
The tool provides comprehensive timezone conversion with automatic DST handling, supports all IANA timezone database entries, and automatically detects your local timezone. It handles complex scenarios like DST transitions and historical timezone changes.
Essential for API development, database operations, system logging, user interface formatting, data analysis, and international business coordination. Supports software development, system administration, and data science workflows requiring accurate time handling.
Processing runs in your browser. Choosing Share uploads the selected tool state; anyone with the link can open it. This interface does not offer account saving. Review the selection before creating a link. Closing the page does not delete a published share. Copying locally uses your clipboard and does not create a server share.