diff --git a/README.md b/README.md
index 6231cdb..bca2733 100644
--- a/README.md
+++ b/README.md
@@ -71,6 +71,31 @@ pipeline.normalize("It's $50 at 3:00PM")
 # => "it is 50 dollars at 3 pm"
 ```
 
+### CLI
+
+```bash
+# Normalize a single text
+gladia-normalization "A tea cost £2 at 3:30PM" --language en
+
+# Normalize a text file
+gladia-normalization --file transcript.txt --language en
+
+# Pipe from stdin
+echo "A tea cost £2 at 3:30PM" | gladia-normalization --language fr
+
+# Use a custom preset
+gladia-normalization "A tea cost £2 at 3:30PM" --preset path/to/my-preset.yaml --language en
+
+# Inspect the pipeline
+gladia-normalization --describe --language en
+```
+
+If you don't want a permanent installation, run it directly with `uvx`:
+
+```bash
+uvx gladia-normalization "A tea cost £2 at 3:30PM" --language en
+```
+
 ## How it works
 
 Every pipeline runs exactly **three stages**, always in this order:
diff --git a/normalization/__main__.py b/normalization/__main__.py
new file mode 100644
index 0000000..5c728b0
--- /dev/null
+++ b/normalization/__main__.py
@@ -0,0 +1,3 @@
+from normalization.cli import main
+
+main()
diff --git a/normalization/cli.py b/normalization/cli.py
new file mode 100644
index 0000000..cf04399
--- /dev/null
+++ b/normalization/cli.py
@@ -0,0 +1,88 @@
+import argparse
+import json
+import sys
+
+from normalization import load_pipeline
+from normalization.languages import get_language_registry
+from normalization.pipeline.loader import _PRESETS_DIR
+
+
+def _available_languages() -> list[str]:
+    import normalization.languages  # noqa: F401 — triggers @register_language decorators
+
+    return sorted(get_language_registry().keys())
+
+
+def _available_presets() -> list[str]:
+    return sorted(p.stem for p in _PRESETS_DIR.glob("*.yaml"))
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(
+        prog="normalize",
+        description="Normalize STT transcription text for fair WER comparison.",
+    )
+    parser.add_argument(
+        "text",
+        nargs="?",
+        help="Text to normalize. Reads from stdin if omitted.",
+    )
+    parser.add_argument(
+        "--language",
+        "-l",
+        default="en",
+        metavar="CODE",
+        help="Language code (default: en). Available: %(choices)s.",
+        choices=_available_languages(),
+    )
+    parser.add_argument(
+        "--preset",
+        "-p",
+        default="gladia-3",
+        metavar="PRESET",
+        help="Built-in preset name or path to a YAML file (default: gladia-3).",
+    )
+    parser.add_argument(
+        "--file",
+        "-f",
+        metavar="PATH",
+        help="Path to a text file to normalize. Mutually exclusive with positional text.",
+    )
+    parser.add_argument(
+        "--describe",
+        action="store_true",
+        help="Print the pipeline description as JSON and exit.",
+    )
+
+    args = parser.parse_args()
+
+    if args.text is not None and args.file is not None:
+        parser.error("Provide either positional text or --file, not both.")
+
+    try:
+        pipeline = load_pipeline(args.preset, args.language)
+    except FileNotFoundError as exc:
+        parser.error(str(exc))
+
+    if args.describe:
+        print(json.dumps(pipeline.describe(), indent=2))
+        return
+
+    if args.file is not None:
+        try:
+            with open(args.file) as fh:
+                text = fh.read().strip()
+        except OSError as exc:
+            parser.error(str(exc))
+    elif args.text is not None:
+        text = args.text
+    elif not sys.stdin.isatty():
+        text = sys.stdin.read().strip()
+    else:
+        parser.error("Provide text as an argument, --file, or pipe it via stdin.")
+
+    print(pipeline.normalize(text))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/pyproject.toml b/pyproject.toml
index fcae854..eac2b9c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,6 +33,9 @@ dependencies = [
 [tool.setuptools.package-data]
 normalization = ["presets/*.yaml"]
 
+[project.scripts]
+gladia-normalization = "normalization.cli:main"
+
 [project.urls]
 Homepage = "https://github.com/gladiaio/normalization"
 Repository = "https://github.com/gladiaio/normalization"