diff --git a/src/utils/templates.py b/src/utils/templates.py
new file mode 100644
index 0000000..d0204da
--- /dev/null
+++ b/src/utils/templates.py
@@ -0,0 +1,190 @@
+import http.server
+import json
+import shutil
+import socketserver
+import tempfile
+from pathlib import Path
+from typing import Any
+
+import click
+import jinja2
+from jinja2 import BaseLoader
+
+from src.core.parser import parse_openapi_spec
+from src.utils.examples import ExampleGenerator
+
+
+class Jinja2Loader(BaseLoader):
+    def __init__(self, templates_dir: Path):
+        self.templates_dir = templates_dir
+
+    def get_source(self, environment: jinja2.Environment, template: str) -> tuple:
+        path = self.templates_dir / template
+        if not path.exists():
+            raise jinja2.TemplateNotFound(template)
+        return path.read_text(), str(path), lambda: True
+
+
+def generate_html(spec_path: str, output_path: str, template_path: str | None = None) -> None:
+    spec = parse_openapi_spec(spec_path)
+    if template_path:
+        template_dir = Path(template_path).parent
+    else:
+        template_dir = Path(__file__).parent.parent / "templates"
+    loader = Jinja2Loader(template_dir)
+    env = jinja2.Environment(loader=loader)
+    env.filters["tojson"] = lambda x: json.dumps(x, indent=2)
+    template = env.get_template(Path(template_path).name if template_path else "html_template.html")
+    spec_dict = spec.model_dump()
+    components_schemas = spec_dict.get("components", {}).get("schemas", {})
+    generator = ExampleGenerator(components_schemas)
+    paths = spec_dict.get("paths", {})
+    for _path, path_item in paths.items():
+        for method in ["get", "put", "post", "delete", "options", "head", "patch", "trace"]:
+            if method in path_item:
+                op = path_item[method]
+                if "requestBody" in op:
+                    rb = op["requestBody"]
+                    if "content" in rb:
+                        for _ct, content in rb["content"].items():
+                            if "schema" in content:
+                                content["example"] = generator.generate(content["schema"])
+    info = spec_dict["info"]
+    tags = spec_dict.get("tags", [])
+    endpoints_by_tag: dict[str, dict[str, dict[str, Any]]] = {}
+    for path, path_item in paths.items():
+        for method in ["get", "put", "post", "delete", "options", "head", "patch", "trace"]:
+            if method in path_item:
+                op = path_item[method]
+                op_tags = op.get("tags", ["Other"])
+                for tag in op_tags:
+                    if tag not in endpoints_by_tag:
+                        endpoints_by_tag[tag] = {}
+                    if path not in endpoints_by_tag[tag]:
+                        endpoints_by_tag[tag][path] = {}
+                    endpoints_by_tag[tag][path][method] = op
+    servers = spec_dict.get("servers", [])
+    components = spec_dict.get("components", {})
+    output = template.render(
+        spec=spec_dict,
+        info=info,
+        paths=paths,
+        servers=servers,
+        tags=tags,
+        endpoints_by_tag=endpoints_by_tag,
+        components=components,
+        security=spec_dict.get("security", []),
+        external_docs=spec_dict.get("externalDocs"),
+    )
+    Path(output_path).write_text(output)
+
+
+def generate_markdown(spec_path: str, output_path: str, template_path: str | None = None) -> None:
+    spec = parse_openapi_spec(spec_path)
+    if template_path:
+        template_dir = Path(template_path).parent
+    else:
+        template_dir = Path(__file__).parent.parent / "templates"
+    loader = Jinja2Loader(template_dir)
+    env = jinja2.Environment(loader=loader)
+    env.filters["tojson"] = lambda x: json.dumps(x, indent=2)
+    template = env.get_template(
+        Path(template_path).name if template_path else "markdown_template.md"
+    )
+    spec_dict = spec.model_dump()
+    components_schemas = spec_dict.get("components", {}).get("schemas", {})
+    generator = ExampleGenerator(components_schemas)
+    paths = spec_dict.get("paths", {})
+    for _path, path_item in paths.items():
+        for method in ["get", "put", "post", "delete", "options", "head", "patch", "trace"]:
+            if method in path_item:
+                op = path_item[method]
+                if "requestBody" in op:
+                    rb = op["requestBody"]
+                    if "content" in rb:
+                        for _ct, content in rb["content"].items():
+                            if "schema" in content:
+                                content["example"] = generator.generate(content["schema"])
+    info = spec_dict["info"]
+    tags = spec_dict.get("tags", [])
+    endpoints_by_tag: dict[str, dict[str, dict[str, Any]]] = {}
+    for path, path_item in paths.items():
+        for method in ["get", "put", "post", "delete", "options", "head", "patch", "trace"]:
+            if method in path_item:
+                op = path_item[method]
+                op_tags = op.get("tags", ["Other"])
+                for tag in op_tags:
+                    if tag not in endpoints_by_tag:
+                        endpoints_by_tag[tag] = {}
+                    if path not in endpoints_by_tag[tag]:
+                        endpoints_by_tag[tag][path] = {}
+                    endpoints_by_tag[tag][path][method] = op
+    servers = spec_dict.get("servers", [])
+    components = spec_dict.get("components", {})
+    output = template.render(
+        spec=spec_dict,
+        info=info,
+        paths=paths,
+        servers=servers,
+        tags=tags,
+        endpoints_by_tag=endpoints_by_tag,
+        components=components,
+        security=spec_dict.get("security", []),
+        external_docs=spec_dict.get("externalDocs"),
+    )
+    Path(output_path).write_text(output)
+
+
+def generate_json(spec_path: str, output_path: str, template_path: str | None = None) -> None:
+    spec = parse_openapi_spec(spec_path)
+    spec_dict = spec.model_dump()
+    components_schemas = spec_dict.get("components", {}).get("schemas", {})
+    generator = ExampleGenerator(components_schemas)
+    paths = spec_dict.get("paths", {})
+    for _path, path_item in paths.items():
+        for method in ["get", "put", "post", "delete", "options", "head", "patch", "trace"]:
+            if method in path_item:
+                op = path_item[method]
+                if "requestBody" in op:
+                    rb = op["requestBody"]
+                    if "content" in rb:
+                        for _ct, content in rb["content"].items():
+                            if "schema" in content:
+                                content["example"] = generator.generate(content["schema"])
+    for _status_code, _response in spec_dict.get("paths", {}).items():
+        pass
+    output = json.dumps(spec_dict, indent=2)
+    Path(output_path).write_text(output)
+
+
+class LocalDocsHandler(http.server.SimpleHTTPRequestHandler):
+    def __init__(self, *args, directory: str | None = None, **kwargs):
+        self.docs_dir = directory
+        super().__init__(*args, directory=directory, **kwargs)
+
+    def do_GET(self):
+        if self.path == "/":
+            self.path = "/index.html"
+        return super().do_GET()
+
+
+class _LocalDocsHandlerWithDir(LocalDocsHandler):
+    def __init__(self, *args, directory: str, **kwargs):
+        self.docs_dir = directory
+        super().__init__(*args, directory=directory, **kwargs)
+
+
+def serve_docs(spec_path: str, host: str = "127.0.0.1", port: int = 8080) -> None:
+    with tempfile.TemporaryDirectory() as tmpdir:
+        generate_html(spec_path, str(Path(tmpdir) / "index.html"))
+        shutil.copy(Path(__file__).parent.parent / "templates" / "html_template.html", tmpdir)
+        try:
+            Path.cwd().chdir(tmpdir)
+            with socketserver.TCPServer(
+                (host, port),
+                lambda *args, **kwargs: _LocalDocsHandlerWithDir(*args, directory=tmpdir, **kwargs)
+            ) as httpd:
+                click.echo(f"Serving API documentation at http://{host}:{port}")
+                httpd.serve_forever()
+        except KeyboardInterrupt:
+            pass