Unix timestamp converter

Converts between Unix timestamps and dates. Seconds or milliseconds are detected automatically.

Now:

Timestamp or date (e.g. 1760745600, 1760745600000, 2025-10-18 08:00, 2025-10-18T00:00:00Z)

Dates without a time zone are read as your local time. Numbers with 12 or more digits are treated as milliseconds. Impossible dates such as 2026-02-30 are rejected instead of rolling over.