The main purpose of converting an email address to HTML ASCII encoding is to prevent web page email harvesters. For example, common methods include replacing @ with #, [at], or simply using images to prevent web page email harvesters. This tool is a more innovative method. The encoded email address can be normally displayed on the web page, but the actual characters in the web page source code are the encoded HTML ASCII encoding, which also achieves the purpose of preventing web page email harvesters from collecting.