Fitch Ratings has developed an interactive online tool for credit rating simulation. 

According to Fitch Ratings, the tool is "a visual overview of the key qualitative and quantitative factors Fitch analyzes to arrive at an entity's credit rating" and the aim of the tool is provide transparency to rating users. (Fitch Ratings, 2018).

• The tool is comprised of a set of qualitative and quantitative factors displayed in a summary chart. 
• The relative rating ranges of individual factors and the overall rating outcome are displayed. 
• Users have the ability to search for existing company outputs or create their own rating display using the provided credit tool templates. 
• Through a set of drop down menus, the user can see the details behind a rating criteria outcome and sensitize or manipulate a criteria to test the credit rating impact. 

You can access the Fitch Navigator online free or charge after signing the disclaimer.