diff --git a/src/lib/modules/file/upload.ts b/src/lib/modules/file/upload.ts
index e2652a1..2c84f93 100644
--- a/src/lib/modules/file/upload.ts
+++ b/src/lib/modules/file/upload.ts
@@ -11,7 +11,7 @@ import {
   digestMessage,
   signMessageHmac,
 } from "$lib/modules/crypto";
-import { generateImageThumbnail, generateVideoThumbnail } from "$lib/modules/thumbnail";
+import { generateThumbnail } from "$lib/modules/thumbnail";
 import type {
   DuplicateFileScanRequest,
   DuplicateFileScanResponse,
@@ -78,30 +78,6 @@ const extractExifDateTime = (fileBuffer: ArrayBuffer) => {
   return new Date(utcDate - offsetMs);
 };
 
-const generateThumbnail = async (file: File, fileType: string) => {
-  let url;
-  try {
-    if (fileType === "image/heic") {
-      const { default: heic2any } = await import("heic2any");
-      url = URL.createObjectURL((await heic2any({ blob: file, toType: "image/png" })) as Blob);
-      return await generateImageThumbnail(url);
-    } else if (fileType.startsWith("image/")) {
-      url = URL.createObjectURL(file);
-      return await generateImageThumbnail(url);
-    } else if (fileType.startsWith("video/")) {
-      url = URL.createObjectURL(file);
-      return await generateVideoThumbnail(url);
-    }
-    return null;
-  } catch {
-    return null;
-  } finally {
-    if (url) {
-      URL.revokeObjectURL(url);
-    }
-  }
-};
-
 const encryptFile = limitFunction(
   async (
     status: Writable<FileUploadStatus>,
@@ -132,7 +108,7 @@ const encryptFile = limitFunction(
       createdAt && (await encryptString(createdAt.getTime().toString(), dataKey));
     const lastModifiedAtEncrypted = await encryptString(file.lastModified.toString(), dataKey);
 
-    const thumbnail = await generateThumbnail(file, fileType);
+    const thumbnail = await generateThumbnail(fileBuffer, fileType);
     const thumbnailBuffer = await thumbnail?.arrayBuffer();
     const thumbnailEncrypted = thumbnailBuffer ? await encryptData(thumbnailBuffer, dataKey) : null;
 
diff --git a/src/lib/modules/thumbnail.ts b/src/lib/modules/thumbnail.ts
index 2352c65..1a24b5d 100644
--- a/src/lib/modules/thumbnail.ts
+++ b/src/lib/modules/thumbnail.ts
@@ -12,7 +12,7 @@ const scaleSize = (width: number, height: number, targetSize: number) => {
   };
 };
 
-export const generateImageThumbnail = (imageUrl: string) => {
+const generateImageThumbnail = (imageUrl: string) => {
   return new Promise<Blob>((resolve, reject) => {
     const image = new Image();
     image.onload = () => {
@@ -42,7 +42,7 @@ export const generateImageThumbnail = (imageUrl: string) => {
   });
 };
 
-export const generateVideoThumbnail = (videoUrl: string, time = 0) => {
+const generateVideoThumbnail = (videoUrl: string, time = 0) => {
   return new Promise<Blob>((resolve, reject) => {
     const video = document.createElement("video");
     video.onloadeddata = () => {
@@ -77,6 +77,35 @@ export const generateVideoThumbnail = (videoUrl: string, time = 0) => {
   });
 };
 
+export const generateThumbnail = async (fileBuffer: ArrayBuffer, fileType: string) => {
+  let url;
+  try {
+    if (fileType === "image/heic") {
+      const { default: heic2any } = await import("heic2any");
+      url = URL.createObjectURL(
+        (await heic2any({
+          blob: new Blob([fileBuffer], { type: fileType }),
+          toType: "image/png",
+        })) as Blob,
+      );
+      return await generateImageThumbnail(url);
+    } else if (fileType.startsWith("image/")) {
+      url = URL.createObjectURL(new Blob([fileBuffer], { type: fileType }));
+      return await generateImageThumbnail(url);
+    } else if (fileType.startsWith("video/")) {
+      url = URL.createObjectURL(new Blob([fileBuffer], { type: fileType }));
+      return await generateVideoThumbnail(url);
+    }
+    return null;
+  } catch {
+    return null;
+  } finally {
+    if (url) {
+      URL.revokeObjectURL(url);
+    }
+  }
+};
+
 export const getThumbnailUrl = (thumbnailBuffer: ArrayBuffer) => {
   return `data:image/webp;base64,${encodeToBase64(thumbnailBuffer)}`;
 };
diff --git a/src/lib/server/db/media.ts b/src/lib/server/db/media.ts
index 8386ffc..209e256 100644
--- a/src/lib/server/db/media.ts
+++ b/src/lib/server/db/media.ts
@@ -106,5 +106,5 @@ export const getMissingFileThumbnails = async (userId: number, limit: number = 1
     )
     .limit(limit)
     .execute();
-  return files.map((file) => file.id);
+  return files.map(({ id }) => id);
 };
diff --git a/src/lib/services/file.ts b/src/lib/services/file.ts
index 1a95538..9ee6e1d 100644
--- a/src/lib/services/file.ts
+++ b/src/lib/services/file.ts
@@ -36,8 +36,8 @@ export const requestFileThumbnailDownload = async (fileId: number, dataKey: Cryp
   if (!res.ok) return null;
 
   const thumbnailEncrypted = await res.arrayBuffer();
-  const thumbnail = await decryptData(thumbnailEncrypted, thumbnailEncryptedIv, dataKey);
+  const thumbnailBuffer = await decryptData(thumbnailEncrypted, thumbnailEncryptedIv, dataKey);
 
-  storeFileThumbnailCache(fileId, thumbnail); // Intended
-  return getThumbnailUrl(thumbnail);
+  storeFileThumbnailCache(fileId, thumbnailBuffer); // Intended
+  return getThumbnailUrl(thumbnailBuffer);
 };
diff --git a/src/routes/(fullscreen)/settings/thumbnails/service.svelte.ts b/src/routes/(fullscreen)/settings/thumbnails/service.svelte.ts
index 4e430d5..aaee616 100644
--- a/src/routes/(fullscreen)/settings/thumbnails/service.svelte.ts
+++ b/src/routes/(fullscreen)/settings/thumbnails/service.svelte.ts
@@ -3,7 +3,7 @@ import { get, writable, type Writable } from "svelte/store";
 import { encryptData } from "$lib/modules/crypto";
 import { storeFileThumbnailCache } from "$lib/modules/file";
 import type { FileInfo } from "$lib/modules/filesystem";
-import { generateImageThumbnail, generateVideoThumbnail } from "$lib/modules/thumbnail";
+import { generateThumbnail as doGenerateThumbnail } from "$lib/modules/thumbnail";
 import type { FileThumbnailUploadRequest } from "$lib/server/schemas";
 import { requestFileDownload } from "$lib/services/file";
 
@@ -38,42 +38,18 @@ const generateThumbnail = limitFunction(
     fileType: string,
     dataKey: CryptoKey,
   ) => {
-    let url, thumbnail;
     status.set("generating");
-
-    try {
-      if (fileType === "image/heic") {
-        const { default: heic2any } = await import("heic2any");
-        url = URL.createObjectURL(
-          (await heic2any({
-            blob: new Blob([fileBuffer], { type: fileType }),
-            toType: "image/png",
-          })) as Blob,
-        );
-        thumbnail = await generateImageThumbnail(url);
-      } else if (fileType.startsWith("image/")) {
-        url = URL.createObjectURL(new Blob([fileBuffer], { type: fileType }));
-        thumbnail = await generateImageThumbnail(url);
-      } else if (fileType.startsWith("video/")) {
-        url = URL.createObjectURL(new Blob([fileBuffer], { type: fileType }));
-        thumbnail = await generateVideoThumbnail(url);
-      } else {
-        status.set("error");
-        return null;
-      }
-
-      const thumbnailBuffer = await thumbnail.arrayBuffer();
-      const thumbnailEncrypted = await encryptData(thumbnailBuffer, dataKey);
-      status.set("upload-pending");
-      return { plaintext: thumbnailBuffer, ...thumbnailEncrypted };
-    } catch {
+    const thumbnail = await doGenerateThumbnail(fileBuffer, fileType);
+    if (!thumbnail) {
       status.set("error");
       return null;
-    } finally {
-      if (url) {
-        URL.revokeObjectURL(url);
-      }
     }
+
+    const thumbnailBuffer = await thumbnail.arrayBuffer();
+    const thumbnailEncrypted = await encryptData(thumbnailBuffer, dataKey);
+
+    status.set("upload-pending");
+    return { plaintext: thumbnailBuffer, ...thumbnailEncrypted };
   },
   { concurrency: 4 },
 );