diff --git a/diagrams/cli.py b/diagrams/cli.py
new file mode 100644
index 0000000..22a7368
--- /dev/null
+++ b/diagrams/cli.py
@@ -0,0 +1,31 @@
+import argparse
+import sys
+
+
+def run() -> int:
+    parser = argparse.ArgumentParser(
+        description="Run diagrams code files in a diagrams environment.",
+    )
+    parser.add_argument(
+        "paths",
+        metavar="path",
+        type=str,
+        nargs="+",
+        help="a Python file containing diagrams code",
+    )
+    args = parser.parse_args()
+
+    for path in args.paths:
+        print(path)
+        with open(path) as f:
+            exec(f.read())
+
+    return 0
+
+
+def main():
+    sys.exit(run())
+
+
+if __name__ == "__main__":
+    main()
diff --git a/docs/getting-started/installation.md b/docs/getting-started/installation.md
index f38b524..4c7ac73 100644
--- a/docs/getting-started/installation.md
+++ b/docs/getting-started/installation.md
@@ -20,6 +20,9 @@ $ pipenv install diagrams
 
 # using poetry
 $ poetry add diagrams
+
+# using pipx
+$ pipx install diagrams
 ```
 
 ## Quick Start
@@ -47,6 +50,21 @@ This generates the diagram below:
 
 It will be saved as `web_service.png` in your working directory.
 
+### CLI
+
+If the `diagrams` CLI has been installed system wide (i.e. with [pipx](https://pipxproject.github.io/pipx/)),
+then the preceding command is equivalent to this.
+
+```shell
+$ diagrams diagram.py
+```
+
+Furthermore you can execute multiple files at once
+
+```shell
+$ diagrams diagram1.py diagram2.py
+```
+
 ## Next
 
 See more [Examples](/docs/getting-started/examples) or see the [Guides](/docs/guides/diagram) page for more details.