diff --git a/packages/next/src/lib/metadata/resolvers/resolve-url.test.ts b/packages/next/src/lib/metadata/resolvers/resolve-url.test.ts
index b9e1caf796aa52..4e57ca6f587f9b 100644
--- a/packages/next/src/lib/metadata/resolvers/resolve-url.test.ts
+++ b/packages/next/src/lib/metadata/resolvers/resolve-url.test.ts
@@ -110,6 +110,13 @@ describe('resolveAbsoluteUrlWithPathname', () => {
         'https://example.com/foo?bar'
       )
     })
+
+    it('should not add trailing slash to relative url that ends with a file extension', () => {
+      expect(resolver('/foo.html')).toBe('https://example.com/foo.html')
+      expect(resolver(new URL('/foo.html', metadataBase))).toBe(
+        'https://example.com/foo.html'
+      )
+    })
   })
 })
 
diff --git a/packages/next/src/lib/metadata/resolvers/resolve-url.ts b/packages/next/src/lib/metadata/resolvers/resolve-url.ts
index 89edce00fa6db2..e4056709549b29 100644
--- a/packages/next/src/lib/metadata/resolvers/resolve-url.ts
+++ b/packages/next/src/lib/metadata/resolvers/resolve-url.ts
@@ -112,6 +112,8 @@ function resolveAbsoluteUrlWithPathname(
     let isRelative = resolvedUrl.startsWith('/')
     let isExternal = false
     let hasQuery = resolvedUrl.includes('?')
+    let hasFileExtension = /\.[0-9a-z]+$/i.test(resolvedUrl)
+
     if (!isRelative) {
       try {
         const parsedUrl = new URL(resolvedUrl)
@@ -121,7 +123,8 @@ function resolveAbsoluteUrlWithPathname(
         // If it's not a valid URL, treat it as external
         isExternal = true
       }
-      if (!isExternal && !hasQuery) return `${resolvedUrl}/`
+      if (!hasFileExtension && !isExternal && !hasQuery)
+        return `${resolvedUrl}/`
     }
   }