diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..94f30e8
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,30 @@
+# EditorConfig helps maintain consistent coding styles across all files
+# https://editorconfig.org
+
+root = true
+
+# Unix-style newlines, UTF-8 encoding for all files
+[*]
+end_of_line = lf
+charset = utf-8
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+# Python: 4 spaces (PEP 8)
+[*.py]
+indent_style = space
+indent_size = 4
+
+# JavaScript/JSON/YAML: 2 spaces (common web standard)
+[*.{js,json,yml,yaml}]
+indent_style = space
+indent_size = 2
+
+# HTML/CSS: 2 spaces
+[*.{html,css}]
+indent_style = space
+indent_size = 2
+
+# Markdown: preserve formatting
+[*.md]
+trim_trailing_whitespace = false
diff --git a/.gitignore b/.gitignore
index 167af95..ff9bd7b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,8 @@ releases/*/kx-bridge
 releases/*/extract_credentials
 releases/*/extract_credentials.exe
 
+node_modules/*
+
 !kx-bridge.spec
 
 # Laufzeit-Daten und Drucker-Credentials — nie committen
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..badd614
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,31 @@
+{
+  "name": "kx-bridge",
+  "version": "0.9.27",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "kx-bridge",
+      "version": "0.9.27",
+      "devDependencies": {
+        "prettier": "^3.0.0"
+      }
+    },
+    "node_modules/prettier": {
+      "version": "3.8.4",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.8.4.tgz",
+      "integrity": "sha512-N2MylSdi48+5N/6S5j+maeHbUSIzzZ5uOcX5Hm4QpV8Dkb1HFjfAKTKX6yNPJQD9AhcT3ifHNB66tWTTJDi11Q==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "prettier": "bin/prettier.cjs"
+      },
+      "engines": {
+        "node": ">=14"
+      },
+      "funding": {
+        "url": "https://github.com/prettier/prettier?sponsor=1"
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..ed86d05
--- /dev/null
+++ b/package.json
@@ -0,0 +1,23 @@
+{
+  "name": "kx-bridge",
+  "version": "0.9.27",
+  "description": "Moonraker-compatible bridge for Anycubic Kobra X",
+  "type": "module",
+  "devDependencies": {
+    "prettier": "^3.0.0"
+  },
+  "scripts": {
+    "format:js": "prettier --write 'web/**/*.js' '*.js'",
+    "format:json": "prettier --write '*.json' 'web/**/*.json'",
+    "format:web": "prettier --write 'web/**/*.{js,json,html,css,yml,yaml,md}'",
+    "format": "npm run format:web"
+  },
+  "prettier": {
+    "semi": true,
+    "singleQuote": false,
+    "trailingComma": "es5",
+    "printWidth": 100,
+    "tabWidth": 2,
+    "useTabs": false
+  }
+}
diff --git a/requirements-dev.txt b/requirements-dev.txt
new file mode 100644
index 0000000..b8483cd
--- /dev/null
+++ b/requirements-dev.txt
@@ -0,0 +1,2 @@
+# Code formatting
+black>=24.1.0