diff --git a/frontend/src/components/custom-tools/prompt-card/PromptCard.jsx b/frontend/src/components/custom-tools/prompt-card/PromptCard.jsx
index 794a450cc..8bccb5607 100644
--- a/frontend/src/components/custom-tools/prompt-card/PromptCard.jsx
+++ b/frontend/src/components/custom-tools/prompt-card/PromptCard.jsx
@@ -171,7 +171,10 @@ const PromptCard = memo(
       highlightedPrompt,
       highlightedProfile
     ) => {
-      if (details?.enable_highlight) {
+      if (
+        details?.enable_highlight &&
+        promptDetailsState?.enforce_type !== "json"
+      ) {
         updateCustomTool({
           selectedHighlight: {
             highlight: highlightData,
diff --git a/frontend/src/components/custom-tools/prompt-card/PromptOutput.jsx b/frontend/src/components/custom-tools/prompt-card/PromptOutput.jsx
index 70580f192..e0d27c58c 100644
--- a/frontend/src/components/custom-tools/prompt-card/PromptOutput.jsx
+++ b/frontend/src/components/custom-tools/prompt-card/PromptOutput.jsx
@@ -84,7 +84,6 @@ function PromptOutput({
   const { generatePromptOutputKey } = usePromptOutput();
   const isTableExtraction =
     enforceType === TABLE_ENFORCE_TYPE || enforceType === RECORD_ENFORCE_TYPE;
-
   const tooltipContent = (adapterConf) => (
     <div>
       {Object.entries(adapterConf)?.map(([key, value]) => (
@@ -205,13 +204,18 @@ function PromptOutput({
               transition={{ duration: 0.5, ease: "linear" }}
               className={`prompt-card-llm ${
                 details?.enable_highlight &&
+                enforceType !== "json" &&
                 selectedHighlight?.highlightedPrompt === promptId &&
                 selectedHighlight?.highlightedProfile === profileId &&
                 "highlighted-prompt-cell"
               }`}
             >
               <Tooltip
-                title={details?.enable_highlight && "Click to highlight"}
+                title={
+                  details?.enable_highlight && enforceType !== "json"
+                    ? "Click to highlight"
+                    : "Highlighting is not supported when enforce type is JSON"
+                }
               >
                 <Col
                   key={profileId}