diff --git a/src/components/JsonViewer/JsonViewer.tsx b/src/components/JsonViewer/JsonViewer.tsx
index e9a79d416d..fbb5c411e3 100644
--- a/src/components/JsonViewer/JsonViewer.tsx
+++ b/src/components/JsonViewer/JsonViewer.tsx
@@ -27,8 +27,7 @@ import ArrowUpFromLineIcon from '@gravity-ui/icons/svgs/arrow-up-from-line.svg';
 
 import './JsonViewer.scss';
 
-interface JsonViewerProps {
-    value: UnipikaValue;
+interface JsonViewerCommonProps {
     unipikaSettings?: UnipikaSettings;
     extraTools?: React.ReactNode;
     tableSettings?: DT100.Settings;
@@ -36,6 +35,14 @@ interface JsonViewerProps {
     collapsedInitially?: boolean;
 }
 
+interface JsonViewerProps extends JsonViewerCommonProps {
+    value: UnipikaValue | {_error: string};
+}
+
+interface JsonViewerComponentProps extends JsonViewerCommonProps {
+    value: UnipikaValue;
+}
+
 interface State {
     flattenResult: FlattenUnipikaResult;
     value: JsonViewerProps['value'];
@@ -88,14 +95,26 @@ function calculateState(
     );
 }
 
-export function JsonViewer({
+function isUnipikaValue(value: UnipikaValue | {_error: string}): value is UnipikaValue {
+    return !('_error' in value);
+}
+
+export function JsonViewer(props: JsonViewerProps) {
+    const {value} = props;
+    if (!isUnipikaValue(value)) {
+        return value._error;
+    }
+    return <JsonViewerComponent {...props} value={value} />;
+}
+
+function JsonViewerComponent({
     tableSettings,
     value,
     unipikaSettings,
     search = true,
     extraTools,
     collapsedInitially,
-}: JsonViewerProps) {
+}: JsonViewerComponentProps) {
     const [caseSensitiveSearch, setCaseSensitiveSearch] = useSetting(
         CASE_SENSITIVE_JSON_SEARCH,
         false,
diff --git a/src/components/JsonViewer/unipika/unipika.ts b/src/components/JsonViewer/unipika/unipika.ts
index 7066ba83d4..9fd5201809 100644
--- a/src/components/JsonViewer/unipika/unipika.ts
+++ b/src/components/JsonViewer/unipika/unipika.ts
@@ -15,7 +15,14 @@ export const defaultUnipikaSettings = {
 };
 
 export function unipikaConvert(value: unknown) {
-    return unipika.converters.yson(value, defaultUnipikaSettings);
+    let result;
+    try {
+        result = unipika.converters.yson(value, defaultUnipikaSettings);
+    } catch (e) {
+        console.error(e);
+        result = {_error: 'JSON is invalid'};
+    }
+    return result;
 }
 
 export function useUnipikaConvert(value: unknown) {