diff --git a/src/utils/image-metadata.ts b/src/utils/image-metadata.ts
index 75b2f6ba..4429cc7a 100644
--- a/src/utils/image-metadata.ts
+++ b/src/utils/image-metadata.ts
@@ -6,23 +6,10 @@ import { Stickynotes } from '@soapbox/stickynotes';
 
 const console = new Stickynotes('ditto:uploaders');
 
-export function toByteArray(f: File): Promise<Uint8Array> {
-  return new Promise((resolve, reject) => {
-    const reader = new FileReader();
-    reader.addEventListener('loadend', (m) => {
-      if (m?.target?.result instanceof ArrayBuffer) {
-        resolve(new Uint8Array(m.target.result));
-      } else reject('Error loading file: readAsArrayBufferFailed');
-    });
-    reader.addEventListener('error', (e) => reject(e));
-    reader.readAsArrayBuffer(f);
-  });
-}
-
 export async function getOptionalNip94Metadata(f: File): Promise<Nip94MetadataOptional> {
   const tags: Nip94MetadataOptional = {};
   try {
-    const buffer = await toByteArray(f);
+    const buffer = await new Response(f.stream()).bytes();
     const hash = await crypto.subtle.digest('SHA-256', buffer).then(encodeHex);
     tags.x = tags.ox = hash;
     const img = sharp(buffer);
diff --git a/src/utils/upload.ts b/src/utils/upload.ts
index cadac9bc..9f4c90a4 100644
--- a/src/utils/upload.ts
+++ b/src/utils/upload.ts
@@ -3,7 +3,7 @@ import { HTTPException } from '@hono/hono/http-exception';
 import { AppContext } from '@/app.ts';
 import { Conf } from '@/config.ts';
 import { DittoUpload, dittoUploads } from '@/DittoUploads.ts';
-import { getOptionalNip94Metadata, toByteArray } from '@/utils/image-metadata.ts';
+import { getOptionalNip94Metadata } from '@/utils/image-metadata.ts';
 import type { Nip94MetadataOptional } from '@/interfaces/Nip94Metadata.ts';
 import { encodeHex } from '@std/encoding/hex';
 
@@ -53,7 +53,8 @@ export async function uploadFile(
     }
   }
   if (!tagMap.has('x') || !tagMap.has('ox')) {
-    const hash = metadata?.x || await crypto.subtle.digest('SHA-256', await toByteArray(file)).then(encodeHex);
+    const hash = metadata?.x ||
+      await crypto.subtle.digest('SHA-256', await new Response(file.stream()).bytes()).then(encodeHex);
     tags.push(['x', hash!]);
     tags.push(['ox', hash!]);
   }