First usable version based on AngularJS 2! Almost no converters yet, though.

app/converter/base64decoder.ts

@@ -0,0 +1,15 @@
+import {Converter} from "./converter";
+
+export class Base64Decoder implements Converter {
+    getDisplayname():string {
+        return "Decode Base 64";
+    }
+
+    getId():string {
+        return "base64decode";
+    }
+
+    convert(input:string):string {
+        return atob(input);
+    }
+}

app/converter/base64encoder.ts

@@ -0,0 +1,15 @@
+import {Converter} from "./converter";
+
+export class Base64Encoder implements Converter {
+    getDisplayname():string {
+        return "Encode Base 64";
+    }
+
+    getId():string {
+        return "base64encode";
+    }
+
+    convert(input:string):string {
+        return btoa(input);
+    }
+}

app/converter/converter.ts

@@ -0,0 +1,5 @@
+export interface Converter {
+    getDisplayname():string;
+    getId():string;
+    convert(input:string):string;
+}