Timestamp converter
Convert between Unix timestamps (seconds/ms) and dates, showing both local and UTC time.
Files are processed in your browser
How it works
Convert timestamps and dates, local and UTC.
- 01
Enter a timestamp, or enter a date and time.
- 02
Seconds or milliseconds are detected automatically; both local and UTC are shown.
- 03
Grab the current timestamp with one click and copy any result.
FAQ
How are seconds and milliseconds told apart?
Unix timestamps come in two common units: seconds (10 digits, like 1757462400) and milliseconds (13 digits, like 1757462400000). The tool decides by digit count: 13 or more is milliseconds, otherwise seconds. JavaScript and Java tend to use milliseconds; most backends and databases use seconds, so check your source.
Why do local time and UTC differ?
A timestamp is a time-zone-free absolute instant (seconds since 1970-01-01 00:00:00 UTC). The same instant shows as different clock times in different zones. The tool gives both your local time and UTC for the same moment — they point to the same instant, just read differently.
Which time zone applies when converting a date to a timestamp?
Your browser's local time zone parses the date you enter. For example, 2026-09-10 12:00:00 is read as noon where you are, then converted. If you want a UTC instant, convert it yourself or add a time-zone marker to the date string.
Does the calculation go online?
No. All conversion uses the browser's local time capabilities, needs no network, and your input is never uploaded.