To convert the string 'false' to the boolean value false in JavaScript, you would use JSON.parse('false'). The JSON.parse() function parses a JSON string and constructs the JavaScript value it represents. Since 'false' is a valid JSON representation of the boolean value false, JSON.parse('false') returns the boolean false. Boolean('false') would not work because any non-empty string, including 'false', is truthy in JavaScript, so it would return true. The comparison operators ('false' == false and 'false' === false) would also not work; they would simply compare the values, not convert one to the other.