diff --git a/src/Illuminate/Foundation/Exceptions/WhoopsHandler.php b/src/Illuminate/Foundation/Exceptions/WhoopsHandler.php
new file mode 100644
index 000000000000..106b89238baf
--- /dev/null
+++ b/src/Illuminate/Foundation/Exceptions/WhoopsHandler.php
@@ -0,0 +1,86 @@
+<?php
+
+namespace Illuminate\Foundation\Exceptions;
+
+use Illuminate\Support\Arr;
+use Illuminate\Filesystem\Filesystem;
+use Whoops\Handler\PrettyPageHandler;
+
+class WhoopsHandler
+{
+    /**
+     * Create a new Whoops handler for debug mode.
+     *
+     * @return \Whoops\Handler\PrettyPageHandler
+     */
+    public function forDebug()
+    {
+        return tap(new PrettyPageHandler, function ($handler) {
+            $handler->handleUnconditionally(true);
+
+            $this->registerApplicationPaths($handler)
+                 ->registerBlacklist($handler)
+                 ->registerEditor($handler);
+        });
+    }
+
+    /**
+     * Register the application paths with the handler.
+     *
+     * @param  \Whoops\Handler\PrettyPageHandler
+     * @return $this
+     */
+    protected function registerApplicationPaths($handler)
+    {
+        $handler->setApplicationPaths(
+            array_flip($this->directoriesExceptVendor())
+        );
+
+        return $this;
+    }
+
+    /**
+     * Get the application paths except for the "vendor" directory.
+     *
+     * @return array
+     */
+    protected function directoriesExceptVendor()
+    {
+        return Arr::except(
+            array_flip((new Filesystem)->directories(base_path())),
+            [base_path('vendor')]
+        );
+    }
+
+    /**
+     * Register the blacklist with the handler.
+     *
+     * @param  \Whoops\Handler\PrettyPageHandler
+     * @return $this
+     */
+    protected function registerBlacklist($handler)
+    {
+        foreach (config('app.debug_blacklist', []) as $key => $secrets) {
+            foreach ($secrets as $secret) {
+                $handler->blacklist($key, $secret);
+            }
+        }
+
+        return $this;
+    }
+
+    /**
+     * Register the editor with the handler.
+     *
+     * @param  \Whoops\Handler\PrettyPageHandler
+     * @return $this
+     */
+    protected function registerEditor($handler)
+    {
+        if (config('app.editor', false)) {
+            $handler->setEditor(config('app.editor'));
+        }
+
+        return $this;
+    }
+}