diff --git a/.changeset/funny-penguins-speak.md b/.changeset/funny-penguins-speak.md
new file mode 100644
index 000000000..83005a03e
--- /dev/null
+++ b/.changeset/funny-penguins-speak.md
@@ -0,0 +1,5 @@
+---
+'@hey-api/openapi-ts': minor
+---
+
+fix(plugins/zod): fix support for string type in binary format
diff --git a/packages/openapi-ts/src/plugins/zod/plugin.ts b/packages/openapi-ts/src/plugins/zod/plugin.ts
index 9c5321ee2..1624dad65 100644
--- a/packages/openapi-ts/src/plugins/zod/plugin.ts
+++ b/packages/openapi-ts/src/plugins/zod/plugin.ts
@@ -35,6 +35,7 @@ const optionalIdentifier = compiler.identifier({ text: 'optional' });
 const readonlyIdentifier = compiler.identifier({ text: 'readonly' });
 const regexIdentifier = compiler.identifier({ text: 'regex' });
 const unionIdentifier = compiler.identifier({ text: 'union' });
+const instanceofIdentifier = compiler.identifier({ text: 'instanceof' });
 const zIdentifier = compiler.identifier({ text: 'z' });
 
 const nameTransformer = (name: string) => `z-${name}`;
@@ -493,6 +494,26 @@ const stringTypeToZodSchema = ({
           }),
         });
         break;
+      case 'binary':
+        stringExpression = compiler.callExpression({
+          functionName: compiler.propertyAccessExpression({
+            expression: zIdentifier,
+            name: unionIdentifier,
+          }),
+          parameters: [
+            compiler.arrayLiteralExpression({
+              elements: ['File', 'Blob'].map((typeIdent) =>
+                compiler.callExpression({
+                  functionName: compiler.propertyAccessExpression({
+                    expression: zIdentifier,
+                    name: instanceofIdentifier,
+                  }),
+                  parameters: [compiler.identifier({ text: typeIdent })],
+                }),
+              ),
+            }),
+          ],
+        });
     }
   }
 
diff --git a/packages/openapi-ts/test/__snapshots__/2.0.x/plugins/zod/default/zod.gen.ts b/packages/openapi-ts/test/__snapshots__/2.0.x/plugins/zod/default/zod.gen.ts
index 64f8926c5..8c0eeed34 100644
--- a/packages/openapi-ts/test/__snapshots__/2.0.x/plugins/zod/default/zod.gen.ts
+++ b/packages/openapi-ts/test/__snapshots__/2.0.x/plugins/zod/default/zod.gen.ts
@@ -24,7 +24,10 @@ export const zSimpleString = z.string();
 
 export const zNonAsciiStringæøåÆøÅöôêÊ字符串 = z.string();
 
-export const zSimpleFile = z.string();
+export const zSimpleFile = z.union([
+    z.instanceof(File),
+    z.instanceof(Blob)
+]);
 
 export const zSimpleReference = z.object({
     prop: z.string().optional()
@@ -156,7 +159,10 @@ export const zModelWithReference = z.object({
 
 export const zModelWithArray = z.object({
     prop: z.array(zModelWithString).optional(),
-    propWithFile: z.array(z.string()).optional(),
+    propWithFile: z.array(z.union([
+        z.instanceof(File),
+        z.instanceof(Blob)
+    ])).optional(),
     propWithNumber: z.array(z.number()).optional()
 });
 
@@ -286,4 +292,4 @@ export const zComplexTypesResponse = z.array(zModelWithString);
 
 export const zNonAsciiæøåÆøÅöôêÊ字符串Response = zNonAsciiStringæøåÆøÅöôêÊ字符串;
 
-export const zPostApiVbyApiVersionBodyResponse = zResponsePostActivityResponse;
\ No newline at end of file
+export const zPostApiVbyApiVersionBodyResponse = zResponsePostActivityResponse;
diff --git a/packages/openapi-ts/test/__snapshots__/3.0.x/plugins/zod/default/zod.gen.ts b/packages/openapi-ts/test/__snapshots__/3.0.x/plugins/zod/default/zod.gen.ts
index a7d288b50..35c1c9261 100644
--- a/packages/openapi-ts/test/__snapshots__/3.0.x/plugins/zod/default/zod.gen.ts
+++ b/packages/openapi-ts/test/__snapshots__/3.0.x/plugins/zod/default/zod.gen.ts
@@ -28,7 +28,10 @@ export const zSimpleString = z.string();
 
 export const zNonAsciiStringæøåÆøÅöôêÊ字符串 = z.string();
 
-export const zSimpleFile = z.string();
+export const zSimpleFile = z.union([
+    z.instanceof(File),
+    z.instanceof(Blob)
+]);
 
 export const zSimpleReference = z.object({
     prop: z.string().optional()
@@ -221,13 +224,19 @@ export const zModelWithArrayReadOnlyAndWriteOnly = z.object({
         bar: z.string().readonly(),
         baz: z.string()
     })).optional(),
-    propWithFile: z.array(z.string()).optional(),
+    propWithFile: z.array(z.union([
+        z.instanceof(File),
+        z.instanceof(Blob)
+    ])).optional(),
     propWithNumber: z.array(z.number()).optional()
 });
 
 export const zModelWithArray = z.object({
     prop: z.array(zModelWithString).optional(),
-    propWithFile: z.array(z.string()).optional(),
+    propWithFile: z.array(z.union([
+        z.instanceof(File),
+        z.instanceof(Blob)
+    ])).optional(),
     propWithNumber: z.array(z.number()).optional()
 });
 
@@ -791,12 +800,18 @@ export const zTypesResponse = z.union([
 
 export const zUploadFileResponse = z.boolean();
 
-export const zFileResponseResponse = z.string();
+export const zFileResponseResponse = z.union([
+    z.instanceof(File),
+    z.instanceof(Blob)
+]);
 
 export const zComplexTypesResponse = z.array(zModelWithString);
 
 export const zMultipartResponseResponse = z.object({
-    file: z.string().optional(),
+    file: z.union([
+        z.instanceof(File),
+        z.instanceof(Blob)
+    ]).optional(),
     metadata: z.object({
         foo: z.string().optional(),
         bar: z.string().optional()
@@ -805,4 +820,4 @@ export const zMultipartResponseResponse = z.object({
 
 export const zComplexParamsResponse = zModelWithString;
 
-export const zNonAsciiæøåÆøÅöôêÊ字符串Response = z.array(zNonAsciiStringæøåÆøÅöôêÊ字符串);
\ No newline at end of file
+export const zNonAsciiæøåÆøÅöôêÊ字符串Response = z.array(zNonAsciiStringæøåÆøÅöôêÊ字符串);
diff --git a/packages/openapi-ts/test/__snapshots__/3.1.x/plugins/zod/default/zod.gen.ts b/packages/openapi-ts/test/__snapshots__/3.1.x/plugins/zod/default/zod.gen.ts
index 789aa4254..e616ff028 100644
--- a/packages/openapi-ts/test/__snapshots__/3.1.x/plugins/zod/default/zod.gen.ts
+++ b/packages/openapi-ts/test/__snapshots__/3.1.x/plugins/zod/default/zod.gen.ts
@@ -28,7 +28,10 @@ export const zSimpleString = z.string();
 
 export const zNonAsciiStringæøåÆøÅöôêÊ字符串 = z.string();
 
-export const zSimpleFile = z.string();
+export const zSimpleFile = z.union([
+    z.instanceof(File),
+    z.instanceof(Blob)
+]);
 
 export const zSimpleReference = z.object({
     prop: z.string().optional()
@@ -224,13 +227,19 @@ export const zModelWithArrayReadOnlyAndWriteOnly = z.object({
         bar: z.string().readonly(),
         baz: z.string()
     })).optional(),
-    propWithFile: z.array(z.string()).optional(),
+    propWithFile: z.array(z.union([
+        z.instanceof(File),
+        z.instanceof(Blob)
+    ])).optional(),
     propWithNumber: z.array(z.number()).optional()
 });
 
 export const zModelWithArray = z.object({
     prop: z.array(zModelWithString).optional(),
-    propWithFile: z.array(z.string()).optional(),
+    propWithFile: z.array(z.union([
+        z.instanceof(File),
+        z.instanceof(Blob)
+    ])).optional(),
     propWithNumber: z.array(z.number()).optional()
 });
 
@@ -782,12 +791,18 @@ export const zTypesResponse = z.union([
 
 export const zUploadFileResponse = z.boolean();
 
-export const zFileResponseResponse = z.string();
+export const zFileResponseResponse = z.union([
+    z.instanceof(File),
+    z.instanceof(Blob)
+]);
 
 export const zComplexTypesResponse = z.array(zModelWithString);
 
 export const zMultipartResponseResponse = z.object({
-    file: z.string().optional(),
+    file: z.union([
+        z.instanceof(File),
+        z.instanceof(Blob)
+    ]).optional(),
     metadata: z.object({
         foo: z.string().optional(),
         bar: z.string().optional()
@@ -796,4 +811,4 @@ export const zMultipartResponseResponse = z.object({
 
 export const zComplexParamsResponse = zModelWithString;
 
-export const zNonAsciiæøåÆøÅöôêÊ字符串Response = z.array(zNonAsciiStringæøåÆøÅöôêÊ字符串);
\ No newline at end of file
+export const zNonAsciiæøåÆøÅöôêÊ字符串Response = z.array(zNonAsciiStringæøåÆøÅöôêÊ字符串);