diff --git a/src/components/Editor/IOEditor/InputValueEditor/InputValueEditor.tsx b/src/components/Editor/IOEditor/InputValueEditor/InputValueEditor.tsx
index 4f1736632..fa4626c18 100644
--- a/src/components/Editor/IOEditor/InputValueEditor/InputValueEditor.tsx
+++ b/src/components/Editor/IOEditor/InputValueEditor/InputValueEditor.tsx
@@ -18,6 +18,8 @@ import { checkInputConnectionToRequiredFields } from "@/utils/inputConnectionUti
 import { inputNameToNodeId } from "@/utils/nodes/nodeIdUtils";
 import { updateSubgraphSpec } from "@/utils/subgraphUtils";
 
+import CodeViewer from "@/components/shared/CodeViewer/CodeViewer";
+
 import { IOZIndexEditor } from "../IOZIndexEditor";
 import {
   DescriptionField,
@@ -55,6 +57,7 @@ export const InputValueEditor = ({
   } = useConfirmationDialog();
 
   const [isValueDialogOpen, setIsValueDialogOpen] = useState(false);
+  const [isCodeEditorOpen, setIsCodeEditorOpen] = useState(false);
   const [triggerSave, setTriggerSave] = useState(false);
 
   const defaultInputValue = input.value ?? input.default ?? "";
@@ -241,6 +244,21 @@ export const InputValueEditor = ({
     setTriggerSave(true);
   };
 
+  const handleOpenCodeEditor = () => {
+    if (disabled) return;
+    setIsCodeEditorOpen(true);
+  };
+
+  const handleCodeEditorConfirm = (value: string) => {
+    setInputValue(value);
+    setIsCodeEditorOpen(false);
+    setTriggerSave(true);
+  };
+
+  const handleCodeEditorCancel = () => {
+    setIsCodeEditorOpen(false);
+  };
+
   useEffect(() => {
     setInputValue(initialInputValue);
     setInputName(input.name);
@@ -295,6 +313,11 @@ export const InputValueEditor = ({
             hidden: disabled,
             onClick: handleExpandValueEditor,
           },
+          {
+            icon: "Code",
+            hidden: disabled,
+            onClick: handleOpenCodeEditor,
+          },
           {
             icon: "Copy",
             hidden: !disabled && !inputValue,
@@ -343,6 +366,15 @@ export const InputValueEditor = ({
         onCancel={handleDialogCancel}
         onConfirm={handleDialogConfirm}
       />
+
+      {isCodeEditorOpen && (
+        <CodeViewer
+          editable
+          code={inputValue}
+          onConfirm={handleCodeEditorConfirm}
+          onCancel={handleCodeEditorCancel}
+        />
+      )}
     </BlockStack>
   );
 };
diff --git a/src/components/shared/CodeViewer/CodeEditor.tsx b/src/components/shared/CodeViewer/CodeEditor.tsx
new file mode 100644
index 000000000..23f0da956
--- /dev/null
+++ b/src/components/shared/CodeViewer/CodeEditor.tsx
@@ -0,0 +1,32 @@
+import MonacoEditor from "@monaco-editor/react";
+import { memo } from "react";
+
+interface CodeEditorProps {
+  value: string;
+  language: string;
+  onChange: (value: string) => void;
+}
+
+const CodeEditor = memo(function CodeEditor({
+  value,
+  language,
+  onChange,
+}: CodeEditorProps) {
+  return (
+    <MonacoEditor
+      language={language}
+      theme="vs-dark"
+      value={value}
+      onChange={(v) => onChange(v ?? "")}
+      options={{
+        minimap: { enabled: false },
+        scrollBeyondLastLine: false,
+        lineNumbers: "on",
+        wordWrap: "on",
+        automaticLayout: true,
+      }}
+    />
+  );
+});
+
+export default CodeEditor;
diff --git a/src/components/shared/CodeViewer/CodeViewer.tsx b/src/components/shared/CodeViewer/CodeViewer.tsx
index 63e4f5858..05f207a5e 100644
--- a/src/components/shared/CodeViewer/CodeViewer.tsx
+++ b/src/components/shared/CodeViewer/CodeViewer.tsx
@@ -2,17 +2,38 @@ import { useEffect, useState } from "react";
 
 import { Button } from "@/components/ui/button";
 import { Icon } from "@/components/ui/icon";
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@/components/ui/select";
 
 import { FullscreenElement } from "../FullscreenElement";
+import CodeEditor from "./CodeEditor";
 import CodeSyntaxHighlighter from "./CodeSyntaxHighlighter";
 
+const LANGUAGE_OPTIONS = [
+  { value: "plaintext", label: "Plain Text" },
+  { value: "yaml", label: "YAML" },
+  { value: "python", label: "Python" },
+  { value: "javascript", label: "JavaScript" },
+  { value: "json", label: "JSON" },
+  { value: "sql", label: "SQL" },
+];
+
 interface CodeViewerProps {
   code: string;
   language?: string;
   filename?: string;
   fullscreen?: boolean;
   scrollToBottom?: boolean;
+  editable?: boolean;
+  initialLanguage?: string;
   onClose?: () => void;
+  onConfirm?: (value: string) => void;
+  onCancel?: () => void;
 }
 
 const DEFAULT_CODE_VIEWER_HEIGHT = 128;
@@ -23,9 +44,17 @@ const CodeViewer = ({
   filename = "",
   fullscreen = false,
   scrollToBottom = false,
+  editable = false,
+  initialLanguage = "plaintext",
   onClose,
+  onConfirm,
+  onCancel,
 }: CodeViewerProps) => {
-  const [isFullscreen, setIsFullscreen] = useState(fullscreen);
+  const [isFullscreen, setIsFullscreen] = useState(
+    editable ? true : fullscreen,
+  );
+  const [editValue, setEditValue] = useState(code);
+  const [selectedLanguage, setSelectedLanguage] = useState(initialLanguage);
 
   const handleToggleFullscreen = () => {
     if (isFullscreen && onClose) {
@@ -38,7 +67,11 @@ const CodeViewer = ({
   useEffect(() => {
     const handleEscapeKey = (e: KeyboardEvent) => {
       if (isFullscreen && e.key === "Escape") {
-        setIsFullscreen(false);
+        if (editable && onCancel) {
+          onCancel();
+        } else {
+          setIsFullscreen(false);
+        }
         e.preventDefault();
         e.stopPropagation();
       }
@@ -49,29 +82,71 @@ const CodeViewer = ({
     return () => {
       document.removeEventListener("keydown", handleEscapeKey);
     };
-  }, [isFullscreen]);
+  }, [isFullscreen, editable, onCancel]);
 
   return (
     <FullscreenElement fullscreen={isFullscreen}>
       <div className="flex flex-col transition-shadow duration-150 bg-slate-900 h-full rounded-md">
         <div className="flex items-center justify-between gap-2 bg-slate-800 sticky top-0 z-10 rounded-t-md px-3 py-2.5">
-          <div className="flex items-baseline gap-2">
-            <span className="font-semibold text-base text-secondary">
-              {filename}
-            </span>
-            <span className="text-sm text-secondary">(Read Only)</span>
-          </div>
-          <Button
-            type="button"
-            variant="ghost"
-            size="icon"
-            onClick={handleToggleFullscreen}
-            className="text-gray-200 hover:text-black"
-            title={isFullscreen ? "Exit fullscreen" : "View fullscreen"}
-            aria-label={isFullscreen ? "Exit fullscreen" : "View fullscreen"}
-          >
-            {isFullscreen ? <Icon name="X" /> : <Icon name="Maximize2" />}
-          </Button>
+          {editable ? (
+            <>
+              <Select
+                value={selectedLanguage}
+                onValueChange={setSelectedLanguage}
+              >
+                <SelectTrigger className="w-36 h-7 text-gray-200 border-slate-600 bg-slate-700 hover:bg-slate-600">
+                  <SelectValue />
+                </SelectTrigger>
+                <SelectContent className="z-2147483647">
+                  {LANGUAGE_OPTIONS.map((opt) => (
+                    <SelectItem key={opt.value} value={opt.value}>
+                      {opt.label}
+                    </SelectItem>
+                  ))}
+                </SelectContent>
+              </Select>
+              <div className="flex items-center gap-2">
+                <Button
+                  type="button"
+                  variant="ghost"
+                  size="sm"
+                  onClick={onCancel}
+                  className="text-gray-200 hover:text-black"
+                >
+                  Cancel
+                </Button>
+                <Button
+                  type="button"
+                  size="sm"
+                  onClick={() => onConfirm?.(editValue)}
+                >
+                  Confirm
+                </Button>
+              </div>
+            </>
+          ) : (
+            <>
+              <div className="flex items-baseline gap-2">
+                <span className="font-semibold text-base text-secondary">
+                  {filename}
+                </span>
+                <span className="text-sm text-secondary">(Read Only)</span>
+              </div>
+              <Button
+                type="button"
+                variant="ghost"
+                size="icon"
+                onClick={handleToggleFullscreen}
+                className="text-gray-200 hover:text-black"
+                title={isFullscreen ? "Exit fullscreen" : "View fullscreen"}
+                aria-label={
+                  isFullscreen ? "Exit fullscreen" : "View fullscreen"
+                }
+              >
+                {isFullscreen ? <Icon name="X" /> : <Icon name="Maximize2" />}
+              </Button>
+            </>
+          )}
         </div>
         <div className="flex-1 relative">
           <div
@@ -81,11 +156,19 @@ const CodeViewer = ({
               minHeight: DEFAULT_CODE_VIEWER_HEIGHT,
             }}
           >
-            <CodeSyntaxHighlighter
-              code={code}
-              language={language}
-              scrollToBottom={scrollToBottom}
-            />
+            {editable ? (
+              <CodeEditor
+                value={editValue}
+                language={selectedLanguage}
+                onChange={setEditValue}
+              />
+            ) : (
+              <CodeSyntaxHighlighter
+                code={code}
+                language={language}
+                scrollToBottom={scrollToBottom}
+              />
+            )}
           </div>
         </div>
       </div>
diff --git a/src/components/shared/ReactFlow/FlowCanvas/TaskNode/AnnotationsEditor/AnnotationsInput.tsx b/src/components/shared/ReactFlow/FlowCanvas/TaskNode/AnnotationsEditor/AnnotationsInput.tsx
index 59f7f1393..80e6314d9 100644
--- a/src/components/shared/ReactFlow/FlowCanvas/TaskNode/AnnotationsEditor/AnnotationsInput.tsx
+++ b/src/components/shared/ReactFlow/FlowCanvas/TaskNode/AnnotationsEditor/AnnotationsInput.tsx
@@ -6,6 +6,7 @@ import {
   useState,
 } from "react";
 
+import CodeViewer from "@/components/shared/CodeViewer/CodeViewer";
 import { MultilineTextInputDialog } from "@/components/shared/Dialogs/MultilineTextInputDialog";
 import { Button } from "@/components/ui/button";
 import { Icon } from "@/components/ui/icon";
@@ -76,6 +77,28 @@ export const AnnotationsInput = ({
     setIsDialogOpen(false);
   }, []);
 
+  const [isCodeEditorOpen, setIsCodeEditorOpen] = useState(false);
+
+  const handleOpenCodeEditor = useCallback(() => {
+    setIsCodeEditorOpen(true);
+  }, []);
+
+  const handleCodeEditorConfirm = useCallback(
+    (newValue: string) => {
+      setInputValue(newValue);
+      setIsCodeEditorOpen(false);
+      if (onBlur && newValue !== lastSavedValue) {
+        onBlur(newValue);
+        setLastSavedValue(newValue);
+      }
+    },
+    [onBlur, lastSavedValue],
+  );
+
+  const handleCodeEditorCancel = useCallback(() => {
+    setIsCodeEditorOpen(false);
+  }, []);
+
   const validateChange = useCallback((e: ChangeEvent<HTMLInputElement>) => {
     const newValue = e.target.value;
 
@@ -358,6 +381,15 @@ export const AnnotationsInput = ({
           >
             <Icon name="Maximize2" />
           </Button>
+          <Button
+            className="absolute right-8 top-1/2 -translate-y-1/2 hover:bg-transparent hover:text-blue-500 hidden group-hover:flex h-8 w-8 p-0"
+            onClick={handleOpenCodeEditor}
+            variant="ghost"
+            type="button"
+            title="Code Editor"
+          >
+            <Icon name="Code" />
+          </Button>
         </div>
         {isInvalid && (
           <InlineStack gap="1" className="my-1">
@@ -411,6 +443,15 @@ export const AnnotationsInput = ({
           required={config?.required}
         />
       )}
+
+      {isCodeEditorOpen && (
+        <CodeViewer
+          editable
+          code={inputValue}
+          onConfirm={handleCodeEditorConfirm}
+          onCancel={handleCodeEditorCancel}
+        />
+      )}
     </>
   );
 };
diff --git a/src/components/shared/ReactFlow/FlowCanvas/TaskNode/ArgumentsEditor/ArgumentInputField.tsx b/src/components/shared/ReactFlow/FlowCanvas/TaskNode/ArgumentsEditor/ArgumentInputField.tsx
index e358e18d0..f669c6ff8 100644
--- a/src/components/shared/ReactFlow/FlowCanvas/TaskNode/ArgumentsEditor/ArgumentInputField.tsx
+++ b/src/components/shared/ReactFlow/FlowCanvas/TaskNode/ArgumentsEditor/ArgumentInputField.tsx
@@ -35,6 +35,8 @@ import {
   isGraphImplementation,
 } from "@/utils/componentSpec";
 
+import CodeViewer from "@/components/shared/CodeViewer/CodeViewer";
+
 import { ArgumentInputDialog } from "./ArgumentInputDialog";
 import { DynamicDataArgumentInput } from "./DynamicDataArgumentInput";
 import { DynamicDataDropdown } from "./DynamicDataDropdown";
@@ -64,6 +66,7 @@ interface PlainArgumentInputProps {
   onInputChange: (e: ChangeEvent) => void;
   onBlur: () => void;
   onExpand: () => void;
+  onOpenCodeEditor: () => void;
   onCopy: () => void;
   onReset: () => void;
   onRemove: () => void;
@@ -87,6 +90,7 @@ const PlainArgumentInput = ({
   onInputChange,
   onBlur,
   onExpand,
+  onOpenCodeEditor,
   onCopy,
   onReset,
   onRemove,
@@ -154,6 +158,17 @@ const PlainArgumentInput = ({
         >
           <Icon name="Maximize2" />
         </TooltipButton>
+        <TooltipButton
+          onClick={onOpenCodeEditor}
+          className={ACTIONS_BASE_CLASS}
+          disabled={disabled}
+          variant="ghost"
+          size="xs"
+          tooltip="Code Editor"
+          data-testid="code-editor-button"
+        >
+          <Icon name="Code" />
+        </TooltipButton>
         {!disabledCopy && (
           <TooltipButton
             onClick={onCopy}
@@ -221,6 +236,7 @@ export const ArgumentInputField = ({
   );
 
   const [isTextareaDialogOpen, setIsTextareaDialogOpen] = useState(false);
+  const [isCodeEditorOpen, setIsCodeEditorOpen] = useState(false);
   const [isSelectSecretDialogOpen, setIsSelectSecretDialogOpen] =
     useState(false);
 
@@ -322,6 +338,24 @@ export const ArgumentInputField = ({
     setIsTextareaDialogOpen(false);
   }, []);
 
+  const handleOpenCodeEditor = useCallback(() => {
+    if (disabled) return;
+    setIsCodeEditorOpen(true);
+  }, [disabled]);
+
+  const handleCodeEditorConfirm = useCallback(
+    (value: string) => {
+      setInputValue(value);
+      setIsCodeEditorOpen(false);
+      handleSubmit(value);
+    },
+    [handleSubmit],
+  );
+
+  const handleCodeEditorCancel = useCallback(() => {
+    setIsCodeEditorOpen(false);
+  }, []);
+
   const handleOpenSecretDialog = useCallback(() => {
     if (disabled) return;
     setIsSelectSecretDialogOpen(true);
@@ -514,6 +548,7 @@ export const ArgumentInputField = ({
               onInputChange={handleInputChange}
               onBlur={handleBlur}
               onExpand={handleExpand}
+              onOpenCodeEditor={handleOpenCodeEditor}
               onCopy={handleCopy}
               onReset={handleReset}
               onRemove={handleRemove}
@@ -538,6 +573,15 @@ export const ArgumentInputField = ({
         onOpenChange={setIsSelectSecretDialogOpen}
         onSelect={handleSecretSelect}
       />
+
+      {isCodeEditorOpen && (
+        <CodeViewer
+          editable
+          code={inputValue}
+          onConfirm={handleCodeEditorConfirm}
+          onCancel={handleCodeEditorCancel}
+        />
+      )}
     </>
   );
 };