diff --git a/doc2man/generators/markdown.py b/doc2man/generators/markdown.py
new file mode 100644
index 0000000..e433ba7
--- /dev/null
+++ b/doc2man/generators/markdown.py
@@ -0,0 +1,134 @@
+"""Markdown generator for Doc2Man."""
+
+from pathlib import Path
+from typing import Any, Dict, List, Optional
+
+from jinja2 import Environment, FileSystemLoader, TemplateSyntaxError
+
+
+def generate_markdown(
+    parsed_data: List[Dict[str, Any]],
+    output_path: Path,
+    template_path: Optional[Path] = None,
+) -> str:
+    """Generate Markdown documentation from parsed data.
+
+    Args:
+        parsed_data: List of parsed documentation dictionaries.
+        output_path: Path to write the markdown file.
+        template_path: Optional custom template file.
+
+    Returns:
+        The generated Markdown content.
+    """
+    env = Environment(
+        loader=FileSystemLoader(str(template_path.parent) if template_path else get_template_dir()),
+        autoescape=True,
+    )
+    env.filters['first_line'] = first_line_filter
+
+    try:
+        if template_path:
+            template = env.from_string(template_path.read_text())
+        else:
+            template = env.get_template("markdown.j2")
+    except TemplateSyntaxError as e:
+        raise ValueError(f"Template syntax error: {e}")
+
+    md_content = template.render(
+        data=parsed_data,
+        title=get_md_title(parsed_data),
+    )
+
+    if output_path:
+        output_path.parent.mkdir(parents=True, exist_ok=True)
+        output_path.write_text(md_content, encoding="utf-8")
+
+    return md_content
+
+
+def first_line_filter(text: str) -> str:
+    """Get the first line of text."""
+    if not text:
+        return ""
+    lines = text.split('\n')
+    return lines[0] if lines else ""
+
+
+def get_template_dir() -> Path:
+    """Get the directory containing templates."""
+    return Path(__file__).parent.parent / "templates"
+
+
+def get_md_title(parsed_data: List[Dict[str, Any]]) -> str:
+    """Extract a title for the Markdown document."""
+    for item in parsed_data:
+        data = item.get("data", {})
+        if data.get("title"):
+            return data["title"]
+        if data.get("functions"):
+            for func in data["functions"]:
+                if func.get("name"):
+                    return func["name"]
+    return "Documentation"
+
+
+class MarkdownValidator:
+    """Validator for Markdown format."""
+
+    VALID_HEADERS = {"#", "##", "###", "####", "#####", "######"}
+
+    @staticmethod
+    def validate(content: str) -> List[str]:
+        """Validate Markdown content.
+
+        Args:
+            content: The Markdown content to validate.
+
+        Returns:
+            List of validation warnings.
+        """
+        warnings = []
+
+        lines = content.split("\n")
+        has_header = False
+
+        for line in lines:
+            stripped = line.lstrip()
+            if stripped.startswith("#"):
+                has_header = True
+                break
+
+        if not has_header:
+            warnings.append("No markdown header found (document should start with #)")
+
+        return warnings
+
+    @staticmethod
+    def validate_code_blocks(content: str) -> List[str]:
+        """Validate code blocks in Markdown.
+
+        Args:
+            content: The Markdown content to validate.
+
+        Returns:
+            List of validation errors.
+        """
+        errors = []
+        lines = content.split("\n")
+        in_code_block = False
+        code_language = None
+
+        for i, line in enumerate(lines):
+            if line.strip().startswith("```"):
+                if not in_code_block:
+                    in_code_block = True
+                    code_language = line.strip()[3:].strip() or None
+                else:
+                    in_code_block = False
+                    code_language = None
+            elif in_code_block and line.strip() and not line.startswith("    ") and not line.startswith("\t"):
+                if code_language is None:
+                    errors.append(f"Line {i+1}: Code block content should be indented or language should be specified")
+
+        return errors