diff --git a/apps/gipy/interface.html b/apps/gipy/interface.html
new file mode 100644
index 000000000..852fdd32a
--- /dev/null
+++ b/apps/gipy/interface.html
@@ -0,0 +1,58 @@
+<html>
+  <head>
+    <link rel="stylesheet" href="../../css/spectre.min.css">
+  </head>
+  <body>
+
+      <p>Please select a gpx file to be converted to gpc and loaded.</p>
+
+
+    <input type="file" is="gpx_file" id="fileInput" accept=".gpx">
+
+    <script src="../../core/lib/customize.js"></script>
+
+    <script type="module">
+
+    import init, { convert_gpx_strings } from "./pkg/gpconv.js";
+    console.log("imported wasm");
+    document.getElementById('fileInput').addEventListener('change', function selectedFileChanged() {
+      if (this.files.length === 0) {
+        console.log('No file selected.');
+        return;
+      }
+
+      let gpx_filename = this.files[0].name;
+      let gpc_filename = gpx_filename.slice(0, gpx_filename.length-4) + ".gpc";
+      while (gpc_filename.length > 28) {
+        let new_name = prompt("enter a shorter destination filename than '" + gpc_filename + "' (28 chars max)", gpc_filename);
+        if (new_name != null && new_name.slice(new_name.length-4) == ".gpc") {
+          gpc_filename = new_name;
+        } else {
+          return;
+        }
+      }
+
+      const reader = new FileReader();
+      reader.onload = function fileReadCompleted() {
+        console.log("reading file completed");
+
+        init().then(() => {
+
+          let gpc_file = convert_gpx_strings(reader.result);
+          let gpc_string = String.fromCharCode.apply(String, gpc_file);
+
+          console.log("uploading");
+          sendCustomizedApp({
+             storage:[
+                 {name:gpc_filename, url:'test.gpc', content:gpc_string},
+             ]
+          });
+        });
+      }
+      reader.readAsText(this.files[0]);
+    });
+
+
+    </script>
+  </body>
+</html>
