Unix Timestamp Converter
Convert Unix epoch timestamps (seconds or milliseconds) to human-readable dates and back. Runs entirely in your browser.
Numeric input with fewer than 12 digits is treated as seconds; 12 or more digits as milliseconds. Date strings are parsed as ISO 8601.
A Unix timestamp counts the seconds (or milliseconds) elapsed since the epoch — January 1, 1970 at 00:00:00 UTC. This converter translates epoch timestamps to ISO 8601, UTC, your local time, and any IANA timezone, and parses date strings back into epoch seconds and milliseconds. Useful for debugging logs, API payloads, JWTs, and database records. No data leaves your browser.