diff --git a/codecs/basis/asdf.html b/codecs/basis/asdf.html
deleted file mode 100644
index 3a2b770b..00000000
--- a/codecs/basis/asdf.html
+++ /dev/null
@@ -1,35 +0,0 @@
-<!doctype html>
-<input type="file" id="file">
-<button id="go">Go</button>
-<script type="module">
-import encFactory from "./enc/basis_enc.js";
-import decFactory from "./dec/basis_dec.js";
-
-const {file, go} = document.all;
-async function main() {
-  const encoder = await encFactory();
-  const bitmap = await createImageBitmap(file.files[0]);
-  const canvas = new OffscreenCanvas(bitmap.width, bitmap.height);
-  const ctx2 = canvas.getContext("2d");
-  ctx2.drawImage(bitmap, 0, 0);
-  const imgData = ctx2.getImageData(0, 0, canvas.width, canvas.height);  
-  const result = encoder.encode(imgData.data, imgData.width, imgData.height);
-  const decoder = await decFactory();
-  console.log({result});
-  const resultImgData = decoder.decode(result);
-  console.log({resultImgData});
-  const cvs = document.createElement("canvas");
-  cvs.width = resultImgData.width;
-  cvs.height = resultImgData.height;
-  const ctx = cvs.getContext("2d");
-  ctx.putImageData(resultImgData, 0, 0);
-  document.body.append(cvs);
-  // const blob = new File([result], "lol.basis");
-  // const u = URL.createObjectURL(blob);
-  // const a = document.createElement("a")
-  // a.download = "lol.basis";
-  // a.href = u;
-  // a.click();
-}
-go.onclick = main;
-</script>
\ No newline at end of file
diff --git a/src/client/lazy-app/Compress/index.tsx b/src/client/lazy-app/Compress/index.tsx
index 19e30fcb..467d167a 100644
--- a/src/client/lazy-app/Compress/index.tsx
+++ b/src/client/lazy-app/Compress/index.tsx
@@ -97,6 +97,9 @@ async function decodeImage(
 
   try {
     if (!canDecode) {
+      if (mimeType === 'image/basisu') {
+        return await workerBridge.basisDecode(signal, blob);
+      }
       if (mimeType === 'image/avif') {
         return await workerBridge.avifDecode(signal, blob);
       }
diff --git a/src/client/lazy-app/util/index.ts b/src/client/lazy-app/util/index.ts
index eb7d81ed..cba6656e 100644
--- a/src/client/lazy-app/util/index.ts
+++ b/src/client/lazy-app/util/index.ts
@@ -152,7 +152,7 @@ const magicNumberMapInput = [
   [/^\x00\x00\x00 ftypavif\x00\x00\x00\x00/, 'image/avif'],
   [/^\xff\x0a/, 'image/jxl'],
   [/^\x00\x00\x00\x0cJXL \x0d\x0a\x87\x0a/, 'image/jxl'],
-  [/^Bs\x10/, 'image/basisu'],
+  [/^sB/, 'image/basisu'],
 ] as const;
 
 export type ImageMimeTypes = typeof magicNumberMapInput[number][1];
diff --git a/src/features/decoders/basis/worker/basisDecode.ts b/src/features/decoders/basis/worker/basisDecode.ts
new file mode 100644
index 00000000..cc93a07a
--- /dev/null
+++ b/src/features/decoders/basis/worker/basisDecode.ts
@@ -0,0 +1,33 @@
+/**
+ * Copyright 2020 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import type { BasisModule } from 'codecs/basis/dec/basis_dec';
+import wasmUrl from 'url:codecs/basis/dec/basis_dec.wasm';
+import { initEmscriptenModule, blobToArrayBuffer } from 'features/worker-utils';
+
+let emscriptenModule: Promise<BasisModule>;
+
+export default async function decode(blob: Blob): Promise<ImageData> {
+  if (!emscriptenModule) {
+    const decoder = await import('codecs/basis/dec/basis_dec');
+    emscriptenModule = initEmscriptenModule(decoder.default, wasmUrl);
+  }
+
+  const [module, data] = await Promise.all([
+    emscriptenModule,
+    blobToArrayBuffer(blob),
+  ]);
+
+  const result = module.decode(data);
+  if (!result) throw new Error('Decoding error');
+  return result;
+}
