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Unix Timestamp Converter

Convert in either direction: enter a Unix timestamp (seconds or milliseconds) or a UTC date and time.

Enter a Unix timestamp or a UTC date and time to convert.

How it works

Timestamps with 10 digits are treated as seconds; 13 digits (or larger values) as milliseconds. Values may include a decimal fraction for sub-second precision when entered as milliseconds.

Date and time fields are combined as UTC. If you also enter a timestamp, the timestamp field takes precedence. For ISO and local formatting of one instant, use the Date Format Converter.