A true and proper search engine optimization analysis is a detailed, time consuming process that must be done if you want an accurate picture of your website. Since there are differing opinions on how detailed an SEO analysis should be I can only speak about what we do at 123webconnect.com.
At 123webconnect.com, our free SEO analysis can take several days to complete. We analysis every aspect of your website from the very first line of code to the very last closing tag (</>).