Bidirectional conversion between Unix timestamps and human-readable dates, with multi-timezone display
Auto-detects 10-digit (seconds) or 13-digit (milliseconds)
The timestamp converter translates between Unix timestamps (seconds or milliseconds since 1970-01-01 UTC) and human-readable date-time strings, in both directions. It auto-detects whether the input is a 10-digit (seconds) or 13-digit (milliseconds) timestamp and displays the result in ISO 8601, RFC 2822, and several major timezones simultaneously.
Common uses include converting timestamps found in server logs, database records, or API responses to readable dates, creating Unix timestamps from a known date-time for use in queries or scripts, and comparing times across timezones when coordinating across regions.
A Unix timestamp is the number of seconds (or milliseconds) elapsed since January 1, 1970, 00:00:00 UTC. It is timezone-independent — the same number always refers to the same instant in time regardless of where you are.
A 10-digit number is almost certainly seconds (e.g. 1703980800); a 13-digit number is almost certainly milliseconds (e.g. 1703980800000). The tool auto-detects this based on digit count.
Unix timestamps are always UTC. If you see an unexpected offset, check which timezone you are displaying. The tool shows multiple timezones including UTC, Shanghai, New York, London, and your local timezone.
The tool accepts many formats including '2023-12-31 08:00:00', '2023-12-31T08:00:00', ISO 8601, and RFC 2822. If no timezone is specified in the input, it is treated as local time.