Unix time converter
Unix time converter lets you convert explicit epoch seconds or milliseconds to UTC and IANA time in your browser.
Time zone converter
Time zone converter lets you compare one instant across multiple IANA time zones in your browser.
Time zone converter
⌂ Inputs and results stay in this browser and are not automatically stored or sent.
Waiting for input
Input
Include Z or a UTC offset to avoid depending on your device time zone.
Output
Waiting for input
Complete text result
How to use
Set the original date/time and time zone, then select regions to compare. Use IANA names such as Asia/Tokyo rather than ambiguous abbreviations.
The local date may change too. Around daylight-saving transitions, check nonexistent or repeated times and share the date and zone along with the clock time.
Examples
2026-10-10T12:00:00ZPrinciples and limits
Each input is limited to 1,048,576 bytes, output to 33,554,432 bytes, and processing to 5,000 ms. Input is never silently truncated.
Guides
Related tools
Cron builder and inspector
Cron builder and inspector lets you validate Unix five-field cron and list upcoming candidate times in your browser.