convert.user.js

// ==UserScript==
// @name         Scratch 2.0 extension converter
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       NitroCipher
// @match        https://scratch.mit.edu/convert
// @grant        none
// @require      https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js
// ==/UserScript==

(function() {
    'use strict';
    var newDesc;
    $.ajax({
        url: "https://raw.githubusercontent.com/NitroCipher/NitroBlock/master/MainScript.js",
        text: "text/plain"
    }).done( function (data) {
        //alert("done");
        var desc = "descriptor" + data.split("var descriptor")[1].split("// Register")[0];
        var descriptor;
        eval(desc);
        //here we go...
        descriptor.blocks.foreach(reformat);

        $(".box-content").html(newDesc);
    });

    function reformat(item, index) {
        newDesc = newDesc + descriptor.blocks[index];
    }
    // Your code here...
})();

What does this do?

It is an unfinished version of this script
https://github.com/ZenithRogue/ext2to3/

It is an unfinished version of this script
https://github.com/ZenithRogue/ext2to3/

Oh wow, this is awesome! Thanks!