diff --git a/godoc/static/playground.js b/godoc/static/playground.js
index 8401157918..59d4cdab13 100644
--- a/godoc/static/playground.js
+++ b/godoc/static/playground.js
@@ -285,6 +285,9 @@ function PlaygroundOutput(el) {
           run();
           e.preventDefault();
           return false;
+        } if (e.ctrlKey) { // +control
+          fmt();
+          e.preventDefault();
         } else {
           autoindent(e.target);
         }
diff --git a/godoc/static/static.go b/godoc/static/static.go
index 2adb8858f9..6dad04f69f 100644
--- a/godoc/static/static.go
+++ b/godoc/static/static.go
@@ -2307,6 +2307,9 @@ function PlaygroundOutput(el) {
           run();
           e.preventDefault();
           return false;
+        } if (e.ctrlKey) { // +control
+          fmt();
+          e.preventDefault();
         } else {
           autoindent(e.target);
         }