diff --git a/api/package.json b/api/package.json
index 4f2b21dc..662479b5 100644
--- a/api/package.json
+++ b/api/package.json
@@ -35,6 +35,7 @@
         "ffmpeg-static": "^5.1.0",
         "hls-parser": "^0.10.7",
         "ipaddr.js": "2.2.0",
+        "mime": "^4.0.4",
         "nanoid": "^5.0.9",
         "set-cookie-parser": "2.6.0",
         "undici": "^5.19.1",
diff --git a/api/src/processing/request.js b/api/src/processing/request.js
index d0b851e8..2e0cce52 100644
--- a/api/src/processing/request.js
+++ b/api/src/processing/request.js
@@ -1,3 +1,4 @@
+import mime from "mime";
 import ipaddr from "ipaddr.js";
 
 import { apiSchema } from "./schema.js";
@@ -51,12 +52,15 @@ export function createResponse(responseType, responseData) {
 
             case "local-processing":
                 response = {
-                    tunnel: createProxyTunnels(responseData),
-
                     type: responseData?.type,
                     service: responseData?.service,
-                    filename: responseData?.filename,
-                    metadata: responseData?.fileMetadata,
+                    tunnel: createProxyTunnels(responseData),
+
+                    output: {
+                        type: mime.getType(responseData?.filename) || undefined,
+                        filename: responseData?.filename,
+                        metadata: responseData?.fileMetadata || undefined,
+                    },
 
                     audio: {
                         copy: responseData?.audioCopy,
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index a55ff959..a13cdea0 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -43,6 +43,9 @@ importers:
       ipaddr.js:
         specifier: 2.2.0
         version: 2.2.0
+      mime:
+        specifier: ^4.0.4
+        version: 4.0.4
       nanoid:
         specifier: ^5.0.9
         version: 5.0.9