diff --git a/editor/App.vue b/editor/App.vue
index 97c77ce..84640aa 100644
--- a/editor/App.vue
+++ b/editor/App.vue
@@ -79,7 +79,23 @@ async function loadDemo() {
   }
 }
 
-onMounted(() => loadDemo())
+async function restoreOrLoad() {
+  const lastSource = localStorage.getItem('editor_last_source')
+  if (lastSource) {
+    try {
+      loading.value = true
+      const resp = await fetch(lastSource)
+      if (resp.ok) {
+        store.loadJSON(await resp.json())
+        store.setSourcePath(lastSource)
+        return
+      }
+    } catch {}
+  }
+  await loadDemo()
+}
+
+onMounted(() => restoreOrLoad())
 </script>
 
 <template>
diff --git a/editor/stores/editorStore.ts b/editor/stores/editorStore.ts
index b4265e3..348ce50 100644
--- a/editor/stores/editorStore.ts
+++ b/editor/stores/editorStore.ts
@@ -130,7 +130,7 @@ export const useEditorStore = defineStore('editor', () => {
     dirty.value = true
   }
 
-  function setSourcePath(p: string) { sourcePath.value = p }
+  function setSourcePath(p: string) { sourcePath.value = p; localStorage.setItem('editor_last_source', p) }
 
   async function autoSave() {
     try {