diff --git a/Formula/openapi-generator.rb b/Formula/openapi-generator.rb
new file mode 100644
index 0000000000000..48c2920548cf3
--- /dev/null
+++ b/Formula/openapi-generator.rb
@@ -0,0 +1,47 @@
+class OpenapiGenerator < Formula
+  desc "Generate clients, server & docs from an OpenAPI spec (v2, v3)"
+  homepage "https://openapi-generator.tech/"
+  url "https://search.maven.org/remotecontent?filepath=org/openapitools/openapi-generator-cli/3.0.1/openapi-generator-cli-3.0.1.jar"
+  sha256 "f3a6fcb06abf19f955d9c9cd8c734e1ebcb5b93dfaa5dbbad5d98e0f2e2e0524"
+
+  head do
+    url "https://github.com/OpenAPITools/openapi-generator.git"
+
+    depends_on "maven" => :build
+  end
+
+  bottle :unneeded
+
+  depends_on :java => "1.8"
+
+  def install
+    # Need to set JAVA_HOME manually since maven overrides 1.8 with 1.7+
+    cmd = Language::Java.java_home_cmd("1.8")
+    ENV["JAVA_HOME"] = Utils.popen_read(cmd).chomp
+    if build.head?
+      system "mvn", "clean", "package"
+      libexec.install "modules/openapi-generator-cli/target/openapi-generator-cli.jar"
+      bin.write_jar_script libexec/"openapi-generator-cli.jar", "openapi-generator"
+    else
+      libexec.install "openapi-generator-cli-#{version}.jar"
+      bin.write_jar_script libexec/"openapi-generator-cli-#{version}.jar", "openapi-generator"
+    end
+  end
+
+  test do
+    (testpath/"minimal.yaml").write <<~EOS
+      ---
+      swagger: '2.0'
+      info:
+        version: 0.0.0
+        title: Simple API
+      paths:
+        /:
+          get:
+            responses:
+              200:
+                description: OK
+    EOS
+    system bin/"openapi-generator", "generate", "-i", "minimal.yaml", "-l", "openapi"
+  end
+end