If you want check two files and find its differences, diffchecker is a free web service that will help you to find difference in two files. It is very simple and easy to use anybody. No sign up is required for using it.
You may upload files from your computer or paste the text into diffchecker website and click “Find Difference!” button then you will show you the differences of two files. The difference part is come with another colour it will help you to easy identification.