Text to Code Ratio is web tool calculate percentage of actual text content and HTML code size (include html tags, css and JavaScript) in a webpage. It is an important factor in search engine racking. If you have a higher code to text ratio then you can better your chances of getting a higher ranking in search engine results.
The code to text ratio of a page is used by search engines and spiders to calculate the relevancy of a webpage. Not all search engines are using the code to text ratio in their index algorithm, but most of them do. Therefore, having a higher code to text ratio than your competitors gives you a good start for on-site optimization.