diff --git a/bun.lockb b/bun.lockb
index 8ccf0b2..bcac739 100755
Binary files a/bun.lockb and b/bun.lockb differ
diff --git a/website/canvas/src/file-system.ts b/labs/persistence/file.ts
similarity index 51%
rename from website/canvas/src/file-system.ts
rename to labs/persistence/file.ts
index 35c5e8b..89be0c7 100644
--- a/website/canvas/src/file-system.ts
+++ b/labs/persistence/file.ts
@@ -1,4 +1,6 @@
-export class FileSaver {
+import { KeyValueStore } from '@lib/indexeddb';
+
+export class FilePicker {
   #id;
   #fileType;
   #fileExtension;
@@ -85,7 +87,7 @@ export class FileSaver {
       types: [
         {
           description: `${this.#fileType.toUpperCase()} document`,
-          accept: { [this.#mimeType]: [this.#fileExtension] },
+          accept: { [this.#mimeType]: [this.#fileExtension] } as FilePickerAcceptType['accept'],
         },
       ],
     });
@@ -99,11 +101,10 @@ export class FileSaver {
     this.#fileHandlerPromise = window
       .showOpenFilePicker({
         id: this.#id,
-        suggestedName: `${this.#id}.${this.#fileType}`,
         types: [
           {
             description: `${this.#fileType.toUpperCase()} document`,
-            accept: { [this.#mimeType]: [this.#fileExtension] },
+            accept: { [this.#mimeType]: [this.#fileExtension] } as FilePickerAcceptType['accept'],
           },
         ],
       })
@@ -114,92 +115,3 @@ export class FileSaver {
     return fileHandler;
   }
 }
-
-declare global {
-  var showSaveFilePicker: (args: any) => Promise<FileSystemFileHandle>;
-  var showOpenFilePicker: (args: any) => Promise<FileSystemFileHandle[]>;
-
-  interface FileSystemHandle {
-    queryPermission: (args: any) => Promise<string>;
-    requestPermission: (args: any) => Promise<string>;
-  }
-}
-
-class KeyValueStore<Data> {
-  #db: Promise<IDBDatabase>;
-  #storeName;
-
-  constructor(name = 'keyval-store') {
-    this.#storeName = name;
-    const request = indexedDB.open(name);
-    request.onupgradeneeded = () => request.result.createObjectStore(name);
-
-    this.#db = this.#promisifyRequest(request);
-  }
-
-  #promisifyRequest<T>(transaction: IDBRequest<T>) {
-    return new Promise<T>((resolve, reject) => {
-      transaction.onsuccess = () => resolve(transaction.result);
-      transaction.onerror = () => reject(transaction.error);
-    });
-  }
-
-  #promisifyTransaction(transaction: IDBTransaction) {
-    return new Promise<void>((resolve, reject) => {
-      transaction.oncomplete = () => resolve();
-      transaction.onabort = transaction.onerror = () => reject(transaction.error);
-    });
-  }
-
-  #getStore(mode: 'readonly' | 'readwrite') {
-    return this.#db.then((db) => db.transaction(this.#storeName, mode).objectStore(this.#storeName));
-  }
-
-  get(key: IDBValidKey): Promise<Data | undefined> {
-    return this.#getStore('readonly').then((store) => this.#promisifyRequest(store.get(key)));
-  }
-
-  set(key: IDBValidKey, value: Data) {
-    return this.#getStore('readwrite').then((store) => {
-      store.put(value, key);
-      return this.#promisifyTransaction(store.transaction);
-    });
-  }
-
-  setMany(entries: [IDBValidKey, Data][]) {
-    return this.#getStore('readwrite').then((store) => {
-      entries.forEach((entry) => store.put(entry[1], entry[0]));
-      return this.#promisifyTransaction(store.transaction);
-    });
-  }
-
-  delete(key: IDBValidKey) {
-    return this.#getStore('readwrite').then((store) => {
-      store.delete(key);
-      return this.#promisifyTransaction(store.transaction);
-    });
-  }
-
-  clear() {
-    return this.#getStore('readwrite').then((store) => {
-      store.clear();
-      return this.#promisifyTransaction(store.transaction);
-    });
-  }
-
-  keys() {
-    return this.#getStore('readwrite').then((store) => this.#promisifyRequest(store.getAllKeys()));
-  }
-
-  values(): Promise<Data[]> {
-    return this.#getStore('readwrite').then((store) => this.#promisifyRequest(store.getAll()));
-  }
-
-  entries(): Promise<[IDBValidKey, Data][]> {
-    return this.#getStore('readwrite').then((store) =>
-      Promise.all([this.#promisifyRequest(store.getAllKeys()), this.#promisifyRequest(store.getAll())]).then(
-        ([keys, values]) => keys.map((key, i) => [key, values[i]])
-      )
-    );
-  }
-}
diff --git a/lib/index.ts b/lib/index.ts
index 494b92a..deed108 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -29,5 +29,7 @@ export * from './EffectIntegrator';
 // WebGL utilities
 export * from './webgl';
 
+export * from './indexeddb';
+
 // Experimental features
 export * from './Experimental';
diff --git a/lib/indexeddb.ts b/lib/indexeddb.ts
new file mode 100644
index 0000000..bf5e389
--- /dev/null
+++ b/lib/indexeddb.ts
@@ -0,0 +1,78 @@
+export class KeyValueStore<Data> {
+  #db: Promise<IDBDatabase>;
+  #storeName;
+
+  constructor(name = 'keyval-store') {
+    this.#storeName = name;
+    const request = indexedDB.open(name);
+    request.onupgradeneeded = () => request.result.createObjectStore(name);
+
+    this.#db = this.#promisifyRequest(request);
+  }
+
+  #promisifyRequest<T>(transaction: IDBRequest<T>) {
+    return new Promise<T>((resolve, reject) => {
+      transaction.onsuccess = () => resolve(transaction.result);
+      transaction.onerror = () => reject(transaction.error);
+    });
+  }
+
+  #promisifyTransaction(transaction: IDBTransaction) {
+    return new Promise<void>((resolve, reject) => {
+      transaction.oncomplete = () => resolve();
+      transaction.onabort = transaction.onerror = () => reject(transaction.error);
+    });
+  }
+
+  #getStore(mode: 'readonly' | 'readwrite') {
+    return this.#db.then((db) => db.transaction(this.#storeName, mode).objectStore(this.#storeName));
+  }
+
+  get(key: IDBValidKey): Promise<Data | undefined> {
+    return this.#getStore('readonly').then((store) => this.#promisifyRequest(store.get(key)));
+  }
+
+  set(key: IDBValidKey, value: Data) {
+    return this.#getStore('readwrite').then((store) => {
+      store.put(value, key);
+      return this.#promisifyTransaction(store.transaction);
+    });
+  }
+
+  setMany(entries: [IDBValidKey, Data][]) {
+    return this.#getStore('readwrite').then((store) => {
+      entries.forEach((entry) => store.put(entry[1], entry[0]));
+      return this.#promisifyTransaction(store.transaction);
+    });
+  }
+
+  delete(key: IDBValidKey) {
+    return this.#getStore('readwrite').then((store) => {
+      store.delete(key);
+      return this.#promisifyTransaction(store.transaction);
+    });
+  }
+
+  clear() {
+    return this.#getStore('readwrite').then((store) => {
+      store.clear();
+      return this.#promisifyTransaction(store.transaction);
+    });
+  }
+
+  keys() {
+    return this.#getStore('readwrite').then((store) => this.#promisifyRequest(store.getAllKeys()));
+  }
+
+  values(): Promise<Data[]> {
+    return this.#getStore('readwrite').then((store) => this.#promisifyRequest(store.getAll()));
+  }
+
+  entries(): Promise<[IDBValidKey, Data][]> {
+    return this.#getStore('readwrite').then((store) =>
+      Promise.all([this.#promisifyRequest(store.getAllKeys()), this.#promisifyRequest(store.getAll())]).then(
+        ([keys, values]) => keys.map((key, i) => [key, values[i]]),
+      ),
+    );
+  }
+}
diff --git a/package.json b/package.json
index 18f5732..e7a9266 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
   "devDependencies": {
     "@types/leaflet": "^1.9.14",
     "@types/node": "^22.10.1",
+    "@types/wicg-file-system-access": "^2023.10.5",
     "@webgpu/types": "^0.1.51",
     "bun-types": "^1.1.38",
     "mitata": "^1.0.20",
diff --git a/tsconfig.json b/tsconfig.json
index 8e3085c..d48a893 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -13,7 +13,7 @@
     "skipLibCheck": true,
     "noUnusedLocals": false,
     "lib": ["DOM", "DOM.Iterable", "ESNext", "WebWorker"],
-    "types": ["@webgpu/types", "@types/node", "bun-types"],
+    "types": ["@webgpu/types", "@types/node", "@types/wicg-file-system-access", "bun-types"],
     "baseUrl": ".",
     "paths": {
       "@lib": ["lib"],