Seconds vs milliseconds
Classic Unix time is seconds since 1970-01-01 UTC (about 10 digits today). Many APIs and JavaScript Date values use milliseconds (13 digits). This tool detects both.
Convert Unix timestamps to dates and back — instantly, in any timezone.
10 digits = seconds · 13 digits = milliseconds
Interpreted in your selected timezone above
Classic Unix time is seconds since 1970-01-01 UTC (about 10 digits today). Many APIs and JavaScript Date values use milliseconds (13 digits). This tool detects both.
Pick any IANA timezone to display the human-readable side. The underlying epoch value is still absolute UTC-based time — only the presentation changes.
Conversion runs locally. Nothing you type is logged or uploaded, which matters when timestamps appear in logs, tokens, or forensic notes.