diff --git a/fe-app-podkop/src/podkop/tabs/diagnostic/initController.ts b/fe-app-podkop/src/podkop/tabs/diagnostic/initController.ts
index c8f3653..413da03 100644
--- a/fe-app-podkop/src/podkop/tabs/diagnostic/initController.ts
+++ b/fe-app-podkop/src/podkop/tabs/diagnostic/initController.ts
@@ -288,7 +288,10 @@ async function handleShowSingBoxConfig() {
     if (showSingBoxConfig.success) {
       ui.showModal(
         _('Show sing-box config'),
-        renderModal(showSingBoxConfig.data as string, 'show_sing_box_config'),
+        renderModal(
+          JSON.stringify(showSingBoxConfig.data, null, 2),
+          'show_sing_box_config',
+        ),
       );
     } else {
       logger.error(
diff --git a/luci-app-podkop/htdocs/luci-static/resources/view/podkop/main.js b/luci-app-podkop/htdocs/luci-static/resources/view/podkop/main.js
index b280531..c8fae38 100644
--- a/luci-app-podkop/htdocs/luci-static/resources/view/podkop/main.js
+++ b/luci-app-podkop/htdocs/luci-static/resources/view/podkop/main.js
@@ -4164,7 +4164,10 @@ async function handleShowSingBoxConfig() {
     if (showSingBoxConfig.success) {
       ui.showModal(
         _("Show sing-box config"),
-        renderModal(showSingBoxConfig.data, "show_sing_box_config")
+        renderModal(
+          JSON.stringify(showSingBoxConfig.data, null, 2),
+          "show_sing_box_config"
+        )
       );
     } else {
       logger.error(