diff --git a/.eslintignore b/.eslintignore
index 4eaf46c6d7d..4c7882c3158 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -3,3 +3,4 @@ build
 my-app*
 packages/react-scripts/template
 packages/react-scripts/fixtures
+packages/react-dev-utils/*.js
diff --git a/package.json b/package.json
index 9cf2f50f14f..56ed477410e 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
     "create-react-app": "node tasks/cra.js",
     "e2e": "tasks/e2e-simple.sh",
     "e2e:docker": "tasks/local-test.sh",
-    "postinstall": "node bootstrap.js && cd packages/react-error-overlay/ && npm run build:prod",
+    "postinstall": "node bootstrap.js && cd packages/react-dev-utils/ && npm run build:prod && cd ../react-error-overlay/ && npm run build:prod",
     "publish": "tasks/release.sh",
     "start": "node packages/react-scripts/scripts/start.js",
     "screencast": "svg-term --cast hItN7sl5yfCPTHxvFg5glhhfp --out screencast.svg --window",
diff --git a/packages/react-dev-utils/.babelrc b/packages/react-dev-utils/.babelrc
new file mode 100644
index 00000000000..c14b2828d16
--- /dev/null
+++ b/packages/react-dev-utils/.babelrc
@@ -0,0 +1,3 @@
+{
+  "presets": ["react-app"]
+}
diff --git a/packages/react-dev-utils/.gitignore b/packages/react-dev-utils/.gitignore
new file mode 100644
index 00000000000..dcaffc008a6
--- /dev/null
+++ b/packages/react-dev-utils/.gitignore
@@ -0,0 +1 @@
+/*.js
diff --git a/packages/react-dev-utils/package.json b/packages/react-dev-utils/package.json
index 54606f33fe8..f96f6d6f05f 100644
--- a/packages/react-dev-utils/package.json
+++ b/packages/react-dev-utils/package.json
@@ -4,6 +4,14 @@
   "description": "Webpack utilities used by Create React App",
   "repository": "facebookincubator/create-react-app",
   "license": "MIT",
+  "scripts": {
+    "test": "jest",
+    "prepublish": "npm run build:prod",
+    "babel": "rimraf *.js && babel src/ -d ./",
+    "build": "cross-env NODE_ENV=development npm run babel",
+    "watch": "cross-env NODE_ENV=development npm run babel -- -w",
+    "build:prod": "cross-env NODE_ENV=production npm run babel"
+  },
   "bugs": {
     "url": "https://github.com/facebookincubator/create-react-app/issues"
   },
@@ -56,9 +64,10 @@
     "text-table": "0.2.0"
   },
   "devDependencies": {
+    "babel-cli": "6.24.1",
+    "babel-preset-react-app": "3.0.2",
+    "cross-env": "5.0.5",
+    "rimraf": "^2.6.1",
     "jest": "20.0.4"
-  },
-  "scripts": {
-    "test": "jest"
   }
 }
diff --git a/packages/react-dev-utils/FileSizeReporter.js b/packages/react-dev-utils/src/FileSizeReporter.js
similarity index 100%
rename from packages/react-dev-utils/FileSizeReporter.js
rename to packages/react-dev-utils/src/FileSizeReporter.js
diff --git a/packages/react-dev-utils/InterpolateHtmlPlugin.js b/packages/react-dev-utils/src/InterpolateHtmlPlugin.js
similarity index 100%
rename from packages/react-dev-utils/InterpolateHtmlPlugin.js
rename to packages/react-dev-utils/src/InterpolateHtmlPlugin.js
diff --git a/packages/react-dev-utils/ModuleScopePlugin.js b/packages/react-dev-utils/src/ModuleScopePlugin.js
similarity index 100%
rename from packages/react-dev-utils/ModuleScopePlugin.js
rename to packages/react-dev-utils/src/ModuleScopePlugin.js
diff --git a/packages/react-dev-utils/WatchMissingNodeModulesPlugin.js b/packages/react-dev-utils/src/WatchMissingNodeModulesPlugin.js
similarity index 100%
rename from packages/react-dev-utils/WatchMissingNodeModulesPlugin.js
rename to packages/react-dev-utils/src/WatchMissingNodeModulesPlugin.js
diff --git a/packages/react-dev-utils/WebpackDevServerUtils.js b/packages/react-dev-utils/src/WebpackDevServerUtils.js
similarity index 100%
rename from packages/react-dev-utils/WebpackDevServerUtils.js
rename to packages/react-dev-utils/src/WebpackDevServerUtils.js
diff --git a/packages/react-dev-utils/checkRequiredFiles.js b/packages/react-dev-utils/src/checkRequiredFiles.js
similarity index 100%
rename from packages/react-dev-utils/checkRequiredFiles.js
rename to packages/react-dev-utils/src/checkRequiredFiles.js
diff --git a/packages/react-dev-utils/clearConsole.js b/packages/react-dev-utils/src/clearConsole.js
similarity index 100%
rename from packages/react-dev-utils/clearConsole.js
rename to packages/react-dev-utils/src/clearConsole.js
diff --git a/packages/react-dev-utils/crossSpawn.js b/packages/react-dev-utils/src/crossSpawn.js
similarity index 100%
rename from packages/react-dev-utils/crossSpawn.js
rename to packages/react-dev-utils/src/crossSpawn.js
diff --git a/packages/react-dev-utils/errorOverlayMiddleware.js b/packages/react-dev-utils/src/errorOverlayMiddleware.js
similarity index 100%
rename from packages/react-dev-utils/errorOverlayMiddleware.js
rename to packages/react-dev-utils/src/errorOverlayMiddleware.js
diff --git a/packages/react-dev-utils/eslintFormatter.js b/packages/react-dev-utils/src/eslintFormatter.js
similarity index 100%
rename from packages/react-dev-utils/eslintFormatter.js
rename to packages/react-dev-utils/src/eslintFormatter.js
diff --git a/packages/react-dev-utils/formatWebpackMessages.js b/packages/react-dev-utils/src/formatWebpackMessages.js
similarity index 100%
rename from packages/react-dev-utils/formatWebpackMessages.js
rename to packages/react-dev-utils/src/formatWebpackMessages.js
diff --git a/packages/react-dev-utils/getProcessForPort.js b/packages/react-dev-utils/src/getProcessForPort.js
similarity index 100%
rename from packages/react-dev-utils/getProcessForPort.js
rename to packages/react-dev-utils/src/getProcessForPort.js
diff --git a/packages/react-dev-utils/ignoredFiles.js b/packages/react-dev-utils/src/ignoredFiles.js
similarity index 100%
rename from packages/react-dev-utils/ignoredFiles.js
rename to packages/react-dev-utils/src/ignoredFiles.js
diff --git a/packages/react-dev-utils/inquirer.js b/packages/react-dev-utils/src/inquirer.js
similarity index 100%
rename from packages/react-dev-utils/inquirer.js
rename to packages/react-dev-utils/src/inquirer.js
diff --git a/packages/react-dev-utils/launchEditor.js b/packages/react-dev-utils/src/launchEditor.js
similarity index 100%
rename from packages/react-dev-utils/launchEditor.js
rename to packages/react-dev-utils/src/launchEditor.js
diff --git a/packages/react-dev-utils/launchEditorEndpoint.js b/packages/react-dev-utils/src/launchEditorEndpoint.js
similarity index 100%
rename from packages/react-dev-utils/launchEditorEndpoint.js
rename to packages/react-dev-utils/src/launchEditorEndpoint.js
diff --git a/packages/react-dev-utils/noopServiceWorkerMiddleware.js b/packages/react-dev-utils/src/noopServiceWorkerMiddleware.js
similarity index 100%
rename from packages/react-dev-utils/noopServiceWorkerMiddleware.js
rename to packages/react-dev-utils/src/noopServiceWorkerMiddleware.js
diff --git a/packages/react-dev-utils/openBrowser.js b/packages/react-dev-utils/src/openBrowser.js
similarity index 100%
rename from packages/react-dev-utils/openBrowser.js
rename to packages/react-dev-utils/src/openBrowser.js
diff --git a/packages/react-dev-utils/printBuildError.js b/packages/react-dev-utils/src/printBuildError.js
similarity index 100%
rename from packages/react-dev-utils/printBuildError.js
rename to packages/react-dev-utils/src/printBuildError.js
diff --git a/packages/react-dev-utils/printHostingInstructions.js b/packages/react-dev-utils/src/printHostingInstructions.js
similarity index 100%
rename from packages/react-dev-utils/printHostingInstructions.js
rename to packages/react-dev-utils/src/printHostingInstructions.js
diff --git a/packages/react-dev-utils/webpackHotDevClient.js b/packages/react-dev-utils/src/webpackHotDevClient.js
similarity index 100%
rename from packages/react-dev-utils/webpackHotDevClient.js
rename to packages/react-dev-utils/src/webpackHotDevClient.js