diff --git a/Formula/mermaid-cli.rb b/Formula/mermaid-cli.rb
new file mode 100644
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--- /dev/null
+++ b/Formula/mermaid-cli.rb
@@ -0,0 +1,42 @@
+require "language/node"
+
+class MermaidCli < Formula
+  desc "Command-line interface (CLI) for mermaid"
+  homepage "https://github.com/mermaid-js/mermaid-cli"
+  url "https://registry.npmjs.org/@mermaid-js/mermaid-cli/-/mermaid-cli-8.8.4.tgz"
+  sha256 "d56089a4e82c0c2bba00397bd7ee73164338da32b8e1c381518242a00e29689b"
+  license "MIT"
+
+  depends_on "node"
+
+  def install
+    system "npm", "install", *Language::Node.std_npm_install_args(libexec)
+    bin.install_symlink Dir["#{libexec}/bin/*"]
+  end
+
+  test do
+    (testpath/"test.mmd").write <<~EOS
+      sequenceDiagram
+          participant Alice
+          participant Bob
+          Alice->>John: Hello John, how are you?
+          loop Healthcheck
+              John->>John: Fight against hypochondria
+          end
+          Note right of John: Rational thoughts <br/>prevail!
+          John-->>Alice: Great!
+          John->>Bob: How about you?
+          Bob-->>John: Jolly good!
+    EOS
+
+    (testpath/"puppeteer-config.json").write <<~EOS
+      {
+        "args": ["--no-sandbox"]
+      }
+    EOS
+
+    system bin/"mmdc", "-p", "puppeteer-config.json", "-i", "#{testpath}/test.mmd", "-o", "#{testpath}/out.svg"
+
+    assert_predicate testpath/"out.svg", :exist?
+  end
+end