OpenAPI: Remove explicit form data Content-Type

.changeset/sad-cups-care.md

@@ -0,0 +1,5 @@
+---
+'fumadocs-openapi': patch
+---
+
+Remove explicit form data `Content-Type`

packages/openapi/src/playground/fetcher.ts

@@ -26,7 +26,10 @@ export function createBrowserFetcher(
   return {
     async fetch(url, options) {
       const headers = new Headers();
-      if (options.bodyMediaType)
+      if (
+        options.bodyMediaType &&
+        options.bodyMediaType !== 'multipart/form-data'
+      )
         headers.append('Content-Type', options.bodyMediaType);
 
       for (const key in options.header) {