Unix Timestamp Converter

How to use

Timestamp → Date

1. Enter a Unix timestamp (seconds or milliseconds) in the top field
2. Press "Convert" to see it in UTC, local time and ISO 8601
3. Press "Now" to fill in the current timestamp

Date → Timestamp

1. Enter a date (e.g. 2026-07-12 09:00:00) in the bottom field
2. Press "Convert" to see the timestamp in seconds and milliseconds

Up to 10 digits is treated as seconds; 13 or more digits as milliseconds. Everything runs in your browser and is never sent to a server.

Example

Converting the timestamp 1752307200 yields:

UTC:  Sat, 12 Jul 2025 08:00:00 GMT
ISO:  2025-07-12T08:00:00.000Z

Converting the date 2026-07-12 09:00:00 gives the seconds and milliseconds based on your local timezone.

FAQ

How does it tell seconds from milliseconds?

By digit count. 13 or more digits is treated as milliseconds, fewer as seconds.

Which timezone is "Local"?

The timezone configured in your browser and OS. UTC is always shown in Coordinated Universal Time.

Is my data stored anywhere?

No. Everything runs in your browser and disappears when you reload the page.