Timestamp Converter — ISO 8601, Unix, UTC
Convert between ISO 8601, Unix timestamps, UTC, and human-readable date formats. Supports seconds and milliseconds.
ISO 8601
2026-02-17T17:17:52.295Z
UTC String
Tue, 17 Feb 2026 17:17:52 GMT
Local String
2/17/2026, 5:17:52 PM
Date Only
2026-02-17
Time Only
17:17:52.295
Unix (seconds)
1771348672
Unix (milliseconds)
1771348672295
Relative
a few seconds ago
What is ISO 8601?
ISO 8601 is the international standard for representing dates and times. Format: YYYY-MM-DDTHH:mm:ss.sssZ. It is widely used in APIs, databases, and log files because it is unambiguous and sortable.
Unix Timestamp vs ISO 8601
A Unix timestamp is the number of seconds since January 1, 1970 (UTC). It is compact but not human-readable. ISO 8601 is human-readable but longer. Both are commonly used in APIs and databases.