diff --git a/web/src/components/MemoEditor/ActionButton/MarkdownMenu.tsx b/web/src/components/MemoEditor/ActionButton/MarkdownMenu.tsx
new file mode 100644
index 00000000..97017909
--- /dev/null
+++ b/web/src/components/MemoEditor/ActionButton/MarkdownMenu.tsx
@@ -0,0 +1,96 @@
+import { Dropdown, IconButton, Menu, MenuButton, MenuItem } from "@mui/joy";
+import Icon from "@/components/Icon";
+import showPreviewMarkdownDialog from "@/components/PreviewMarkdownDialog";
+import { EditorRefActions } from "../Editor";
+
+interface Props {
+  editorRef: React.RefObject<EditorRefActions>;
+}
+
+const MarkdownMenu = (props: Props) => {
+  const { editorRef } = props;
+
+  const handleCodeBlockClick = () => {
+    if (!editorRef.current) {
+      return;
+    }
+
+    const cursorPosition = editorRef.current.getCursorPosition();
+    const prevValue = editorRef.current.getContent().slice(0, cursorPosition);
+    if (prevValue === "" || prevValue.endsWith("\n")) {
+      editorRef.current.insertText("", "```\n", "\n```");
+    } else {
+      editorRef.current.insertText("", "\n```\n", "\n```");
+    }
+    setTimeout(() => {
+      editorRef.current?.scrollToCursor();
+      editorRef.current?.focus();
+    });
+  };
+
+  const handleCheckboxClick = () => {
+    if (!editorRef.current) {
+      return;
+    }
+
+    const currentPosition = editorRef.current.getCursorPosition();
+    const currentLineNumber = editorRef.current.getCursorLineNumber();
+    const currentLine = editorRef.current.getLine(currentLineNumber);
+    let newLine = "";
+    let cursorChange = 0;
+    if (/^- \[( |x|X)\] /.test(currentLine)) {
+      newLine = currentLine.replace(/^- \[( |x|X)\] /, "");
+      cursorChange = -6;
+    } else if (/^\d+\. |- /.test(currentLine)) {
+      const match = currentLine.match(/^\d+\. |- /) ?? [""];
+      newLine = currentLine.replace(/^\d+\. |- /, "- [ ] ");
+      cursorChange = -match[0].length + 6;
+    } else {
+      newLine = "- [ ] " + currentLine;
+      cursorChange = 6;
+    }
+    editorRef.current.setLine(currentLineNumber, newLine);
+    editorRef.current.setCursorPosition(currentPosition + cursorChange);
+    setTimeout(() => {
+      editorRef.current?.scrollToCursor();
+      editorRef.current?.focus();
+    });
+  };
+
+  const handlePreviewClick = () => {
+    showPreviewMarkdownDialog(editorRef.current?.getContent() ?? "");
+  };
+
+  return (
+    <Dropdown>
+      <MenuButton
+        slots={{ root: IconButton }}
+        slotProps={{
+          root: {
+            className:
+              "flex flex-row justify-center items-center p-1 w-auto h-auto mr-1 select-none rounded cursor-pointer text-gray-600 dark:!text-gray-400 hover:bg-gray-300 dark:hover:bg-zinc-800 hover:shadow",
+            size: "sm",
+          },
+        }}
+      >
+        <Icon.SquareSlash className="w-5 h-5 mx-auto" />
+      </MenuButton>
+      <Menu className="text-sm" size="sm">
+        <MenuItem onClick={handleCodeBlockClick}>
+          <Icon.Code2 className="w-4 h-auto" />
+          <span>Code block</span>
+        </MenuItem>
+        <MenuItem onClick={handleCheckboxClick}>
+          <Icon.CheckSquare className="w-4 h-auto" />
+          <span>Checkbox</span>
+        </MenuItem>
+        <MenuItem onClick={handlePreviewClick}>
+          <Icon.NotebookText className="w-4 h-auto" />
+          <span>Preview</span>
+        </MenuItem>
+      </Menu>
+    </Dropdown>
+  );
+};
+
+export default MarkdownMenu;
diff --git a/web/src/components/MemoEditor/index.tsx b/web/src/components/MemoEditor/index.tsx
index 2db720cb..9a72c991 100644
--- a/web/src/components/MemoEditor/index.tsx
+++ b/web/src/components/MemoEditor/index.tsx
@@ -18,6 +18,7 @@ import showCreateMemoRelationDialog from "../CreateMemoRelationDialog";
 import showCreateResourceDialog from "../CreateResourceDialog";
 import Icon from "../Icon";
 import VisibilityIcon from "../VisibilityIcon";
+import MarkdownMenu from "./ActionButton/MarkdownMenu";
 import TagSelector from "./ActionButton/TagSelector";
 import Editor, { EditorRefActions } from "./Editor";
 import RelationListView from "./RelationListView";
@@ -366,7 +367,7 @@ const MemoEditor = (props: Props) => {
       onFocus={handleEditorFocus}
     >
       <Editor ref={editorRef} {...editorConfig} />
-      <div className="relative w-full flex flex-row justify-between items-center pt-2">
+      <div className="relative w-full flex flex-row justify-between items-center pt-2" onFocus={(e) => e.stopPropagation()}>
         <div className="flex flex-row justify-start items-center">
           <TagSelector onTagSelectorClick={(tag) => handleTagSelectorClick(tag)} />
           <IconButton
@@ -383,6 +384,7 @@ const MemoEditor = (props: Props) => {
           >
             <Icon.Link className="w-5 h-5 mx-auto" />
           </IconButton>
+          <MarkdownMenu editorRef={editorRef} />
         </div>
       </div>
       <ResourceListView resourceList={state.resourceList} setResourceList={handleSetResourceList} />
diff --git a/web/src/components/PreviewMarkdownDialog.tsx b/web/src/components/PreviewMarkdownDialog.tsx
new file mode 100644
index 00000000..82b14fcb
--- /dev/null
+++ b/web/src/components/PreviewMarkdownDialog.tsx
@@ -0,0 +1,57 @@
+import { useEffect, useState } from "react";
+import { markdownServiceClient } from "@/grpcweb";
+import { Node } from "@/types/proto/api/v2/markdown_service";
+import { generateDialog } from "./Dialog";
+import Icon from "./Icon";
+import MemoContent from "./MemoContent";
+
+interface Props extends DialogProps {
+  content: string;
+}
+
+const PreviewMarkdownDialog: React.FC<Props> = ({ content, destroy }: Props) => {
+  const [nodes, setNodes] = useState<Node[]>([]);
+
+  useEffect(() => {
+    (async () => {
+      const { nodes } = await markdownServiceClient.parseMarkdown({
+        markdown: content,
+      });
+      setNodes(nodes);
+    })();
+  }, []);
+
+  const handleCloseBtnClick = () => {
+    destroy();
+  };
+
+  return (
+    <>
+      <div className="dialog-header-container">
+        <div className="flex flex-row justify-start items-center">
+          <p className="text-black opacity-80 dark:text-gray-200">Preview</p>
+        </div>
+        <button className="btn close-btn" onClick={handleCloseBtnClick}>
+          <Icon.X />
+        </button>
+      </div>
+      <div className="flex flex-col justify-start items-start max-w-full w-[32rem]">
+        <MemoContent nodes={nodes} />
+      </div>
+    </>
+  );
+};
+
+export default function showPreviewMarkdownDialog(content: string): void {
+  generateDialog(
+    {
+      className: "preview-markdown-dialog",
+      dialogName: "preview-markdown-dialog",
+      containerClassName: "dark:!bg-zinc-800",
+    },
+    PreviewMarkdownDialog,
+    {
+      content,
+    }
+  );
+}