This may be important to some people who want to past text and make all of that text in capital letters.
All you do is paste your text into the top form and then click on the check box below the bottom field convert case lower > UPPER and then click on Convert Text and BOOM, you have all your text converted into upper case letters.
You can also down-convert upper cased text to lower cased if you prefer. Also, you can replace a specific text with another text if you use the options in the middle of the two text boxes.
Via Case Convert