In this tutorial i will talk about HTML Form File Upload and HTML Multiple File Upload. If you want to allow a user to upload the file to your website, you need to use a file upload box, also known as a file select box. This is created using the input element and the type attribute is set to file. To allow multiple file uploads in HTML forms, use the multiple attributes. The multiple attribute is a boolean attribute. When present, it specifies that the user is allowed to enter more than one value in the input element.