1. Prepare
Enter a Unix timestamp or ISO date with Z or an explicit offset. Example: 1704067200 corresponds to 2024-01-01T00:00:00.000Z.
Integers with an absolute value up to 9,999,999,999 are Unix seconds; from 1,000,000,000,000, they are Unix milliseconds.
Status
Ready
Input size
10 bytes
Output size
24 bytes
Detected mode
UNIX to date
Format
ISO 8601
Practical usage guide
Convert Unix seconds or milliseconds to ISO UTC, or ISO timestamps with Z or an offset to Unix seconds.
Enter a Unix timestamp or ISO date with Z or an explicit offset. Example: 1704067200 corresponds to 2024-01-01T00:00:00.000Z.
Check detected seconds or milliseconds and the UTC result. Units are distinguished by magnitude; ambiguous values are rejected without assuming a local timezone.
Keep the source unit and timezone with the result. Wrong original units or offsets can still produce the wrong business date.