diff --git a/README.md b/README.md
index cf4bed1f..18b617b3 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,7 @@ to merge it in.
     - [JavaScript port](#javascript-port)
     - [C# port](#c-port-1)
     - [Linting tool](#linting-tool)
+    - [Online playground](#online-playground)
 
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->
 
@@ -886,7 +887,11 @@ format.
 #### Linting tool
 
    * A web based linting tool http://www.hoconlint.com/
-   
+
+#### Online playground
+
+   * https://hocon-playground.herokuapp.com/
+
 # Maintanance notes
 
 ## License