diff --git a/metagpt/actions/design_api.py b/metagpt/actions/design_api.py
index 2f65b34c5..566e96efe 100644
--- a/metagpt/actions/design_api.py
+++ b/metagpt/actions/design_api.py
@@ -34,7 +34,12 @@ from metagpt.const import (
 from metagpt.logs import logger
 from metagpt.schema import AIMessage, Document, Documents, Message
 from metagpt.tools.tool_registry import register_tool
-from metagpt.utils.common import aread, awrite, to_markdown_code_block
+from metagpt.utils.common import (
+    aread,
+    awrite,
+    save_json_to_markdown,
+    to_markdown_code_block,
+)
 from metagpt.utils.mermaid import mermaid_to_file
 from metagpt.utils.project_repo import ProjectRepo
 from metagpt.utils.report import DocsReporter, GalleryReporter
@@ -305,4 +310,5 @@ class WriteDesign(Action):
         await self._save_data_api_design(design_doc=design, output_filename=output_filename)
         output_filename = output_pathname.parent / f"{output_pathname.stem}-sequence-diagram"
         await self._save_seq_flow(design_doc=design, output_filename=output_filename)
+        await save_json_to_markdown(content=design.content, output_filename=output_pathname.with_suffix(".md"))
         return f'System Design filename: "{str(output_pathname)}"'
diff --git a/metagpt/actions/write_prd.py b/metagpt/actions/write_prd.py
index 6bbbcf4db..b6062c36c 100644
--- a/metagpt/actions/write_prd.py
+++ b/metagpt/actions/write_prd.py
@@ -41,7 +41,13 @@ from metagpt.const import (
 from metagpt.logs import logger
 from metagpt.schema import AIMessage, Document, Documents, Message
 from metagpt.tools.tool_registry import register_tool
-from metagpt.utils.common import CodeParser, aread, awrite, to_markdown_code_block
+from metagpt.utils.common import (
+    CodeParser,
+    aread,
+    awrite,
+    save_json_to_markdown,
+    to_markdown_code_block,
+)
 from metagpt.utils.file_repository import FileRepository
 from metagpt.utils.mermaid import mermaid_to_file
 from metagpt.utils.project_repo import ProjectRepo
@@ -330,4 +336,5 @@ class WritePRD(Action):
         await awrite(filename=output_pathname, data=new_prd.content)
         competitive_analysis_filename = output_pathname.parent / f"{output_pathname.stem}-competitive-analysis"
         await self._save_competitive_analysis(prd_doc=new_prd, output_filename=Path(competitive_analysis_filename))
+        await save_json_to_markdown(content=new_prd.content, output_filename=output_pathname.with_suffix(".md"))
         return f'PRD filename: "{str(output_pathname)}"'
diff --git a/metagpt/utils/common.py b/metagpt/utils/common.py
index bfc01d2e4..b58ac99da 100644
--- a/metagpt/utils/common.py
+++ b/metagpt/utils/common.py
@@ -40,6 +40,7 @@ from tenacity import RetryCallState, RetryError, _utils
 from metagpt.const import MARKDOWN_TITLE_PREFIX, MESSAGE_ROUTE_TO_ALL
 from metagpt.logs import logger
 from metagpt.utils.exceptions import handle_exception
+from metagpt.utils.json_to_markdown import json_to_markdown
 
 
 def check_cmd_exists(command) -> int:
@@ -950,7 +951,65 @@ def get_markdown_code_block_type(filename: str) -> str:
 
 
 def to_markdown_code_block(val: str, type_: str = "") -> str:
+    """
+    Convert a string to a Markdown code block.
+
+    This function takes a string and wraps it in a Markdown code block.
+    If a type is provided, it adds it as a language identifier for syntax highlighting.
+
+    Args:
+        val (str): The string to be converted to a Markdown code block.
+        type_ (str, optional): The language identifier for syntax highlighting.
+            Defaults to an empty string.
+
+    Returns:
+        str: The input string wrapped in a Markdown code block.
+            If the input string is empty, it returns an empty string.
+
+    Examples:
+        >>> to_markdown_code_block("print('Hello, World!')", "python")
+        \n```python\nprint('Hello, World!')\n```\n
+
+        >>> to_markdown_code_block("Some text")
+        \n```\nSome text\n```\n
+    """
     if not val:
         return val or ""
     val = val.replace("```", "\\`\\`\\`")
     return f"\n```{type_}\n{val}\n```\n"
+
+
+async def save_json_to_markdown(content: str, output_filename: str | Path):
+    """
+    Saves the provided JSON content as a Markdown file.
+
+    This function takes a JSON string, converts it to Markdown format,
+    and writes it to the specified output file.
+
+    Args:
+        content (str): The JSON content to be converted.
+        output_filename (str or Path): The path where the output Markdown file will be saved.
+
+    Returns:
+        None
+
+    Raises:
+        None: Any exceptions are logged and the function returns without raising them.
+
+    Examples:
+        >>> await save_json_to_markdown('{"key": "value"}', Path("/path/to/output.md"))
+        This will save the Markdown converted JSON to the specified file.
+
+    Notes:
+        - This function handles `json.JSONDecodeError` specifically for JSON parsing errors.
+        - Any other exceptions during the process are also logged and handled gracefully.
+    """
+    try:
+        m = json.loads(content)
+    except json.JSONDecodeError as e:
+        logger.warning(f"Failed to decode JSON content: {e}")
+        return
+    except Exception as e:
+        logger.warning(f"An unexpected error occurred: {e}")
+        return
+    await awrite(filename=output_filename, data=json_to_markdown(m))