1.Copy and paste the text that you want to modify into the first textarea labeled "Input". 2.In the second input field labeled "Words (search:replace)", enter the words that you want to replace and the words that you want to replace them with, separated by a colon (:) and each pair separated by a comma (,). For example: "bad:good, ugly:pretty". 3.Click the "Replace" button to replace all instances of the search words with the replace words. 4.The updated text will appear in the second textarea labeled "Output".