This website can help you differentiate between lower case, UPPER CASE in i or L. You can input your sentences or words in the input section. Sometimes, the English language is very confusing. For words like "Illinois," it's tough to see the actual difference between i or L without the help of our website. Some people even get confused between 1 and I and l. This website can make your life easier. https://www.iorl.vision/