diff --git a/src/lib/recentFiles.ts b/src/lib/recentFiles.ts
new file mode 100644
index 0000000..3f1b92e
--- /dev/null
+++ b/src/lib/recentFiles.ts
@@ -0,0 +1,122 @@
+// Armazena os arquivos GLB recentes (após conversão) para reuso rápido,
+// sem necessidade de recarregar da nuvem ou do disco local.
+//
+// Estratégia:
+//  - Metadados (lista JSON ordenada) em localStorage  → leitura síncrona / rápida
+//  - Blob real do GLB em IndexedDB                    → suporta arquivos grandes
+
+const META_KEY = 'tsxr_recent_files_v1';
+const DB_NAME = 'tsxr-recent';
+const STORE = 'glb';
+const MAX_RECENTS = 6;
+
+export interface RecentFileMeta {
+  id: string;          // chave no IndexedDB
+  fileName: string;    // nome do arquivo GLB
+  fileSize: number;    // bytes
+  addedAt: number;     // timestamp ms
+}
+
+// ── IndexedDB helpers ─────────────────────────────────────────────
+function openDB(): Promise<IDBDatabase> {
+  return new Promise((resolve, reject) => {
+    const req = indexedDB.open(DB_NAME, 1);
+    req.onupgradeneeded = () => {
+      const db = req.result;
+      if (!db.objectStoreNames.contains(STORE)) db.createObjectStore(STORE);
+    };
+    req.onsuccess = () => resolve(req.result);
+    req.onerror = () => reject(req.error);
+  });
+}
+
+async function idbPut(id: string, blob: Blob): Promise<void> {
+  const db = await openDB();
+  await new Promise<void>((resolve, reject) => {
+    const tx = db.transaction(STORE, 'readwrite');
+    tx.objectStore(STORE).put(blob, id);
+    tx.oncomplete = () => resolve();
+    tx.onerror = () => reject(tx.error);
+  });
+  db.close();
+}
+
+async function idbGet(id: string): Promise<Blob | undefined> {
+  const db = await openDB();
+  const blob = await new Promise<Blob | undefined>((resolve, reject) => {
+    const tx = db.transaction(STORE, 'readonly');
+    const req = tx.objectStore(STORE).get(id);
+    req.onsuccess = () => resolve(req.result as Blob | undefined);
+    req.onerror = () => reject(req.error);
+  });
+  db.close();
+  return blob;
+}
+
+async function idbDelete(id: string): Promise<void> {
+  const db = await openDB();
+  await new Promise<void>((resolve, reject) => {
+    const tx = db.transaction(STORE, 'readwrite');
+    tx.objectStore(STORE).delete(id);
+    tx.oncomplete = () => resolve();
+    tx.onerror = () => reject(tx.error);
+  });
+  db.close();
+}
+
+// ── Metadata helpers ─────────────────────────────────────────────
+export function listRecentFiles(): RecentFileMeta[] {
+  try {
+    const raw = localStorage.getItem(META_KEY);
+    if (!raw) return [];
+    const parsed = JSON.parse(raw) as RecentFileMeta[];
+    return Array.isArray(parsed) ? parsed : [];
+  } catch {
+    return [];
+  }
+}
+
+function saveMeta(list: RecentFileMeta[]) {
+  try { localStorage.setItem(META_KEY, JSON.stringify(list)); } catch {}
+}
+
+/** Registra um GLB nos recentes (substitui se mesmo fileName) e mantém apenas MAX_RECENTS. */
+export async function addRecentFile(fileName: string, blob: Blob): Promise<void> {
+  try {
+    const list = listRecentFiles();
+    const existing = list.find(r => r.fileName === fileName);
+    const id = existing?.id ?? `rf_${Date.now().toString(36)}_${Math.random().toString(36).slice(2, 6)}`;
+    await idbPut(id, blob);
+    const filtered = list.filter(r => r.fileName !== fileName);
+    const next: RecentFileMeta[] = [
+      { id, fileName, fileSize: blob.size, addedAt: Date.now() },
+      ...filtered,
+    ].slice(0, MAX_RECENTS);
+    // Limpa blobs removidos
+    for (const r of filtered.slice(MAX_RECENTS - 1)) {
+      try { await idbDelete(r.id); } catch {}
+    }
+    saveMeta(next);
+  } catch (e) {
+    console.warn('[recentFiles] addRecent failed', e);
+  }
+}
+
+/** Recupera o blob de um recente e devolve um object URL pronto para uso. */
+export async function loadRecentFile(id: string): Promise<{ url: string; blob: Blob } | null> {
+  const blob = await idbGet(id);
+  if (!blob) return null;
+  return { url: URL.createObjectURL(blob), blob };
+}
+
+export async function removeRecentFile(id: string): Promise<void> {
+  const list = listRecentFiles().filter(r => r.id !== id);
+  saveMeta(list);
+  try { await idbDelete(id); } catch {}
+}
+
+export async function clearRecentFiles(): Promise<void> {
+  const list = listRecentFiles();
+  for (const r of list) { try { await idbDelete(r.id); } catch {} }
+  saveMeta([]);
+}