diff --git a/src/Microsoft.OpenApi/Any/OpenApiAnyExtensions.cs b/src/Microsoft.OpenApi/Any/OpenApiAnyExtensions.cs
new file mode 100644
index 000000000..265425c22
--- /dev/null
+++ b/src/Microsoft.OpenApi/Any/OpenApiAnyExtensions.cs
@@ -0,0 +1,28 @@
+//---------------------------------------------------------------------
+// <copyright file="OpenApiAnyExtensions.cs" company="Microsoft">
+//      Copyright (C) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
+// </copyright>
+//---------------------------------------------------------------------
+
+namespace Microsoft.OpenApi
+{
+    /// <summary>
+    /// Extension methods covert <see cref="System.String"/> to <see cref="IOpenApiAny"/>
+    /// </summary>
+    internal static class OpenApiAnyExtensions
+    {
+        public static IOpenApiAny CreateOpenApiAny(this string input)
+        {
+            if (input == null)
+            {
+                return new OpenApiNull();
+            }
+
+            // TODO: add the logics
+
+
+            // If we can't distiguish the type, just return it as string.
+            return new OpenApiString(input);
+        }
+    }
+}