diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index ec79579..f049223 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -46,6 +46,10 @@ class Configuration implements ConfigurationInterface
                         ->scalarNode('enabled')->defaultTrue()->end()
                         ->scalarNode('endpoint')->defaultNull()->end()
                         ->scalarNode('accept_type')->defaultValue('')->end()
+                        ->enumNode('body_format')
+                            ->values(array('form', 'json'))
+                            ->defaultValue('form')
+                        ->end()
                         ->arrayNode('request_format')
                             ->addDefaultsIfNotSet()
                             ->children()
diff --git a/DependencyInjection/NelmioApiDocExtension.php b/DependencyInjection/NelmioApiDocExtension.php
index ce10263..d26a39d 100644
--- a/DependencyInjection/NelmioApiDocExtension.php
+++ b/DependencyInjection/NelmioApiDocExtension.php
@@ -34,6 +34,7 @@ class NelmioApiDocExtension extends Extension
         $container->setParameter('nelmio_api_doc.sandbox.endpoint', $config['sandbox']['endpoint']);
         $container->setParameter('nelmio_api_doc.sandbox.request_format.method', $config['sandbox']['request_format']['method']);
         $container->setParameter('nelmio_api_doc.sandbox.accept_type', $config['sandbox']['accept_type']);
+        $container->setParameter('nelmio_api_doc.sandbox.body_format', $config['sandbox']['body_format']);
         $container->setParameter('nelmio_api_doc.sandbox.request_format.default_format', $config['sandbox']['request_format']['default_format']);
 
         $loader = new XmlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
diff --git a/Formatter/HtmlFormatter.php b/Formatter/HtmlFormatter.php
index d4520fc..750f82c 100644
--- a/Formatter/HtmlFormatter.php
+++ b/Formatter/HtmlFormatter.php
@@ -50,6 +50,11 @@ class HtmlFormatter extends AbstractFormatter
      */
     private $acceptType;
 
+    /**
+     * @var string
+     */
+    private $bodyFormat;
+
     /**
      * @var array
      */
@@ -108,6 +113,14 @@ class HtmlFormatter extends AbstractFormatter
         $this->acceptType = $acceptType;
     }
 
+    /**
+     * @param string $bodyFormat
+     */
+    public function setBodyFormat($bodyFormat)
+    {
+        $this->bodyFormat = $bodyFormat;
+    }
+
     /**
      * @param string $method
      */
@@ -179,6 +192,7 @@ class HtmlFormatter extends AbstractFormatter
             'enableSandbox'        => $this->enableSandbox,
             'requestFormatMethod'  => $this->requestFormatMethod,
             'acceptType'           => $this->acceptType,
+            'bodyFormat'           => $this->bodyFormat,
             'defaultRequestFormat' => $this->defaultRequestFormat,
             'date'                 => date(DATE_RFC822),
             'css'                  => file_get_contents(__DIR__ . '/../Resources/public/css/screen.css'),
diff --git a/Resources/config/formatters.xml b/Resources/config/formatters.xml
index 8a21d80..53c31be 100644
--- a/Resources/config/formatters.xml
+++ b/Resources/config/formatters.xml
@@ -49,6 +49,9 @@
             <call method="setAcceptType">
                 <argument>%nelmio_api_doc.sandbox.accept_type%</argument>
             </call>
+            <call method="setBodyFormat">
+                <argument>%nelmio_api_doc.sandbox.body_format%</argument>
+            </call>
             <call method="setAuthentication">
                 <argument>%nelmio_api_doc.sandbox.authentication%</argument>
             </call>
diff --git a/Resources/views/layout.html.twig b/Resources/views/layout.html.twig
index 0f25f43..7631331 100644
--- a/Resources/views/layout.html.twig
+++ b/Resources/views/layout.html.twig
@@ -16,10 +16,10 @@
         <div id="header">
             <a href=""><h1>{{ apiName }}</h1></a>
             <div id="sandbox_configuration">
-                content format:
-                <select id="content_format">
-                    <option value="x-www-form-urlencoded">Form Data</option>
-                    <option value="json">JSON</option>
+                body format:
+                <select id="body_format">
+                    <option value="x-www-form-urlencoded"{{ bodyFormat == 'form' ? ' selected' : '' }}>Form Data</option>
+                    <option value="json"{{ bodyFormat == 'json' ? ' selected' : '' }}>JSON</option>
                 </select>
                 request format:
                 <select id="request_format">
@@ -158,6 +158,7 @@
                         method = method.split('|').sort().pop();
                     }
 
+                    // set default requestFormat
                     var requestFormat = $('#request_format').val();
                     var requestFormatMethod = '{{ requestFormatMethod }}';
                     if (requestFormatMethod == 'format_param') {
@@ -166,8 +167,12 @@
                         headers['Accept'] = 'application/' + requestFormat;
                     }
 
-                    // set content format
-                    var contentFormat = $('#content_format').val();
+                    // set default bodyFormat
+                    var bodyFormat = $('#body_format').val();
+
+                    if(!('Content-type' in headers)) {
+                        headers['Content-type'] = 'application/'+bodyFormat;
+                    }
 
                     // retrieve all the parameters to send
                     $('.parameters .tuple', $(this)).each(function() {
@@ -192,9 +197,6 @@
                             headers[key] = value;
                         }
 
-                        if(!('Content-type' in headers)) {
-                            headers['Content-type'] = 'application/'+contentFormat;
-                        }
                     });
 
                     // fix parameters in URL
@@ -226,13 +228,11 @@
 
                     // prepare final parameters
                     var body = params;
-                    if(contentFormat == 'json') {
+                    if(bodyFormat == 'json') {
                         body = JSON.stringify(body);
                     }
                     var data = content.length ? content : body;
 
-                    console.log(contentFormat); console.log(data);
-
                     // and trigger the API call
                     $.ajax({
                         url: endpoint + url,