diff --git a/templates/base/http-clients/axios-http-client.eta b/templates/base/http-clients/axios-http-client.eta
index 0f6923a3d..c842d306e 100644
--- a/templates/base/http-clients/axios-http-client.eta
+++ b/templates/base/http-clients/axios-http-client.eta
@@ -69,6 +69,20 @@ export class HttpClient<SecurityDataType = unknown> {
     }
 
     protected createFormData(input: Record<string, unknown>): FormData {
+      return Object.keys(input || {}).reduce((formData, key) => {
+        const property = input[key];
+        const propertyContent: Iterable<any> = (property instanceof Array) ? property : [property]
+
+        for (const formItem of propertyContent) {
+          const isFileType = formItem instanceof Blob || formItem instanceof File;
+          formData.append(
+            key,
+            isFileType ? formItem : this.stringifyFormItem(formItem)
+            );
+        }
+
+        return formData;
+      }, new FormData());
       return Object.keys(input || {}).reduce((formData, key) => {
         const property = input[key];
         formData.append(
@@ -98,7 +112,7 @@ export class HttpClient<SecurityDataType = unknown> {
 <% } %>
         const secureParams = ((typeof secure === 'boolean' ? secure : this.secure) && this.securityWorker && (await this.securityWorker(this.securityData))) || {};
         const requestParams = this.mergeRequestParams(params, secureParams);
-        const responseFormat = (format && this.format) || void 0;
+        const responseFormat = (format || this.format) || undefined;
 
         if (type === ContentType.FormData && body && body !== null && typeof body === "object") {
           body = this.createFormData(body as Record<string, unknown>);
diff --git a/tests/spec/axios/schema.ts b/tests/spec/axios/schema.ts
index 8c0bda14e..64a6eeaa8 100644
--- a/tests/spec/axios/schema.ts
+++ b/tests/spec/axios/schema.ts
@@ -1513,6 +1513,17 @@ export class HttpClient<SecurityDataType = unknown> {
   }
 
   protected createFormData(input: Record<string, unknown>): FormData {
+    return Object.keys(input || {}).reduce((formData, key) => {
+      const property = input[key];
+      const propertyContent: Iterable<any> = property instanceof Array ? property : [property];
+
+      for (const formItem of propertyContent) {
+        const isFileType = formItem instanceof Blob || formItem instanceof File;
+        formData.append(key, isFileType ? formItem : this.stringifyFormItem(formItem));
+      }
+
+      return formData;
+    }, new FormData());
     return Object.keys(input || {}).reduce((formData, key) => {
       const property = input[key];
       formData.append(
@@ -1542,7 +1553,7 @@ export class HttpClient<SecurityDataType = unknown> {
         (await this.securityWorker(this.securityData))) ||
       {};
     const requestParams = this.mergeRequestParams(params, secureParams);
-    const responseFormat = (format && this.format) || void 0;
+    const responseFormat = format || this.format || undefined;
 
     if (type === ContentType.FormData && body && body !== null && typeof body === "object") {
       body = this.createFormData(body as Record<string, unknown>);
diff --git a/tests/spec/axiosSingleHttpClient/schema.ts b/tests/spec/axiosSingleHttpClient/schema.ts
index 9baf8d02e..8f03ee186 100644
--- a/tests/spec/axiosSingleHttpClient/schema.ts
+++ b/tests/spec/axiosSingleHttpClient/schema.ts
@@ -1513,6 +1513,23 @@ export class HttpClient<SecurityDataType = unknown> {
   }
 
   protected createFormData(input: Record<string, unknown>): FormData {
+    return Object.keys(input || {}).reduce((formData, key) => {
+      let property = input[key];
+      let propertyContent: Iterable<any> = property instanceof Array ? property : [property];
+
+      for (const formItem of propertyContent) {
+        formData.append(
+          key,
+          formItem instanceof Blob || formItem instanceof File
+            ? formItem
+            : typeof formItem === "object" && formItem !== null
+            ? JSON.stringify(formItem)
+            : `${formItem}`,
+        );
+      }
+
+      return formData;
+    }, new FormData());
     return Object.keys(input || {}).reduce((formData, key) => {
       const property = input[key];
       formData.append(
@@ -1542,7 +1559,7 @@ export class HttpClient<SecurityDataType = unknown> {
         (await this.securityWorker(this.securityData))) ||
       {};
     const requestParams = this.mergeRequestParams(params, secureParams);
-    const responseFormat = (format && this.format) || void 0;
+    const responseFormat = format || this.format || void 0;
 
     if (type === ContentType.FormData && body && body !== null && typeof body === "object") {
       body = this.createFormData(body as Record<string, unknown>);
diff --git a/tests/spec/jsAxios/schema.js b/tests/spec/jsAxios/schema.js
index 66a3b86d3..164669eb7 100644
--- a/tests/spec/jsAxios/schema.js
+++ b/tests/spec/jsAxios/schema.js
@@ -44,7 +44,23 @@ export class HttpClient {
       },
     };
   }
+  stringifyFormItem(formItem) {
+    if (typeof formItem === "object" && formItem !== null) {
+      return JSON.stringify(formItem);
+    } else {
+      return `${formItem}`;
+    }
+  }
   createFormData(input) {
+    return Object.keys(input || {}).reduce((formData, key) => {
+      const property = input[key];
+      const propertyContent = property instanceof Array ? property : [property];
+      for (const formItem of propertyContent) {
+        const isFileType = formItem instanceof Blob || formItem instanceof File;
+        formData.append(key, isFileType ? formItem : stringifyFormItem(formItem));
+      }
+      return formData;
+    }, new FormData());
     return Object.keys(input || {}).reduce((formData, key) => {
       const property = input[key];
       formData.append(