diff --git a/.github/git-hooks/pre-commit b/.github/git-hooks/pre-commit
new file mode 100755
index 0000000..5dca88b
--- /dev/null
+++ b/.github/git-hooks/pre-commit
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+# Prettify all selected files
+ ./node_modules/.bin/prettier --write .
+
+# Add back the modified/prettified files to staging
+git add .
+
+exit 0
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index 4fc03a5..5476be3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,6 @@
-/.metadata/
+# Node
+/node_modules/
+package
 # Maven
 /target/
 /com.aobuchow.themes.spectrum/target/
@@ -7,5 +9,6 @@
 /bin/
 # Eclipse Core      
 /.settings/
+/.metadata/
 # JDT-specific (Eclipse Java Development Tools)     
 .classpath
\ No newline at end of file
diff --git a/.prettierignore b/.prettierignore
new file mode 100644
index 0000000..5b03913
--- /dev/null
+++ b/.prettierignore
@@ -0,0 +1,6 @@
+/node_modules/
+README.MD
+.github/workflows/
+com.aobuchow.themes.spectrum/bin/
+package.json
+package-lock.json
\ No newline at end of file
diff --git a/.prettierrc.json b/.prettierrc.json
new file mode 100644
index 0000000..193fd8e
--- /dev/null
+++ b/.prettierrc.json
@@ -0,0 +1,12 @@
+{
+  "semi": false,
+  "singleQuote": true,
+  "overrides": [
+    {
+      "files": "com.aobuchow.themes.spectrum/css/preference_styles.css",
+      "options": {
+        "printWidth": 50
+      }
+    }
+  ]
+}
diff --git a/com.aobuchow.themes.spectrum/.externalToolBuilders/Prettier-Format.launch b/com.aobuchow.themes.spectrum/.externalToolBuilders/Prettier-Format.launch
new file mode 100644
index 0000000..ec5a075
--- /dev/null
+++ b/com.aobuchow.themes.spectrum/.externalToolBuilders/Prettier-Format.launch
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<launchConfiguration type="org.eclipse.ui.externaltools.ProgramBuilderLaunchConfigurationType">
+    <stringAttribute key="org.eclipse.debug.core.ATTR_REFRESH_SCOPE" value="${project}"/>
+    <booleanAttribute key="org.eclipse.debug.ui.ATTR_LAUNCH_IN_BACKGROUND" value="true"/>
+    <stringAttribute key="org.eclipse.ui.externaltools.ATTR_LOCATION" value="${project_loc}/../node_modules/prettier/bin-prettier.js"/>
+    <stringAttribute key="org.eclipse.ui.externaltools.ATTR_RUN_BUILD_KINDS" value="auto,"/>
+    <stringAttribute key="org.eclipse.ui.externaltools.ATTR_TOOL_ARGUMENTS" value="--write . --ignore-path ./../.prettierignore"/>
+    <booleanAttribute key="org.eclipse.ui.externaltools.ATTR_TRIGGERS_CONFIGURED" value="true"/>
+    <stringAttribute key="org.eclipse.ui.externaltools.ATTR_WORKING_DIRECTORY" value="${workspace_loc:/com.aobuchow.themes.spectrum}"/>
+</launchConfiguration>
diff --git a/com.aobuchow.themes.spectrum/.project b/com.aobuchow.themes.spectrum/.project
index 5f4a8b6..6492811 100644
--- a/com.aobuchow.themes.spectrum/.project
+++ b/com.aobuchow.themes.spectrum/.project
@@ -20,6 +20,16 @@
 			<arguments>
 			</arguments>
 		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.ui.externaltools.ExternalToolBuilder</name>
+			<triggers>auto,</triggers>
+			<arguments>
+				<dictionary>
+					<key>LaunchConfigHandle</key>
+					<value>&lt;project&gt;/.externalToolBuilders/Prettier-Format.launch</value>
+				</dictionary>
+			</arguments>
+		</buildCommand>
 	</buildSpec>
 	<natures>
 		<nature>org.eclipse.pde.PluginNature</nature>
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..1b598b9
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,14 @@
+{
+  "name": "eclipse-spectrum-theme-dev",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "prettier": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.0.5.tgz",
+      "integrity": "sha512-7PtVymN48hGcO4fGjybyBSIWDsLU4H4XlvOHfq91pz9kkGlonzwTfYkaIEwiRg/dAJF9YlbsduBAgtYLi+8cFg==",
+      "dev": true
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..834d590
--- /dev/null
+++ b/package.json
@@ -0,0 +1,22 @@
+{
+  "name": "eclipse-spectrum-theme-dev",
+  "version": "1.0.0",
+  "description": "Development utilities for Eclipse Spectrum Theme",
+  "main": "index.js",
+  "scripts": {
+    "format": "./node_modules/prettier/bin-prettier.js --write ."
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/AObuchow/Eclipse-Spectrum-Theme.git"
+  },
+  "author": "AObuchow",
+  "license": "SEE LICENSE IN https://github.com/AObuchow/Eclipse-Spectrum-Theme/blob/master/LICENSE",
+  "bugs": {
+    "url": "https://github.com/AObuchow/Eclipse-Spectrum-Theme/issues"
+  },
+  "homepage": "https://github.com/AObuchow/Eclipse-Spectrum-Theme#readme",
+  "devDependencies": {
+    "prettier": "2.0.5"
+  }
+}