Frequently Asked Questions
Can I convert both seconds and milliseconds Unix values?
Yes. The converter accepts both and resolves them to human-readable date output.
Can I convert a date back to Unix time?
Yes. Use the Date to Unix page to convert a date/time value to seconds and milliseconds.
Does timezone affect output?
Yes. ISO output is UTC while the local string reflects your browser timezone.
Example input/output
Input: 1716239022
Output: 2024-05-20 17:43:42 UTC
How it works
This tool uses JavaScript's Date object to convert between Unix timestamps and human-readable date strings. Millisecond timestamps are detected automatically. Date-to-Unix conversion uses Date.parse(). Processing runs in your browser.
Common use cases
- Convert Unix timestamps from API responses to human-readable dates
- Look up the Unix timestamp for a specific date and time
- Debug timestamp handling in logs and API payloads