Regex Tester & Validator

This PCRE regex parses structured log entries by capturing key fields: a syslog-style timestamp (e.g., 'Mon DD HH:MM:SS'), an IPv4 address, a session ID in '[S=...]' format, a letter-prefixed ID field ('[XID=...]'), an optional reference number in '(N ...)' format, optional message content, and an optional '[Time:...]' field. It's useful for extracting data from system or application logs that follow this specific multi-field format, common in security or authentication logging systems.