diff --git a/ui/desktop/src/components/ErrorBoundary.tsx b/ui/desktop/src/components/ErrorBoundary.tsx
index 4784024502f0..8163b5fb0cff 100644
--- a/ui/desktop/src/components/ErrorBoundary.tsx
+++ b/ui/desktop/src/components/ErrorBoundary.tsx
@@ -1,7 +1,7 @@
 import React from 'react';
 import { Button } from './ui/button';
 import { AlertTriangle } from 'lucide-react';
-import { errorMessage } from '../utils/conversionUtils';
+import { errorMessage, formatErrorForLogging } from '../utils/conversionUtils';
 import { trackErrorWithContext, trackEvent, getErrorType } from '../utils/analytics';
 
 function getCurrentPage(): string {
@@ -10,7 +10,8 @@ function getCurrentPage(): string {
 
 // Capture unhandled promise rejections
 window.addEventListener('unhandledrejection', (event) => {
-  window.electron.logInfo(`[UNHANDLED REJECTION] ${event.reason}`);
+  const reasonStr = formatErrorForLogging(event.reason);
+  window.electron.logInfo(`[UNHANDLED REJECTION] ${reasonStr}`);
   trackErrorWithContext(event.reason, {
     component: 'global',
     page: getCurrentPage(),
diff --git a/ui/desktop/src/components/settings/chat/GoosehintsModal.tsx b/ui/desktop/src/components/settings/chat/GoosehintsModal.tsx
index e74c20adb39c..b4e925c930b5 100644
--- a/ui/desktop/src/components/settings/chat/GoosehintsModal.tsx
+++ b/ui/desktop/src/components/settings/chat/GoosehintsModal.tsx
@@ -9,6 +9,7 @@ import {
   DialogHeader,
   DialogTitle,
 } from '../../ui/dialog';
+import { errorMessage } from '../../../utils/conversionUtils';
 
 const HelpText = () => (
   <div className="text-sm flex-col space-y-4 text-text-muted">
@@ -39,7 +40,7 @@ const HelpText = () => (
 
 const ErrorDisplay = ({ error }: { error: Error }) => (
   <div className="text-sm text-text-muted">
-    <div className="text-red-600">Error reading .goosehints file: {JSON.stringify(error)}</div>
+    <div className="text-red-600">Error reading .goosehints file: {errorMessage(error)}</div>
   </div>
 );
 
diff --git a/ui/desktop/src/components/settings/providers/modal/ProviderConfiguationModal.tsx b/ui/desktop/src/components/settings/providers/modal/ProviderConfiguationModal.tsx
index 24a49151e7b4..688d86cfc767 100644
--- a/ui/desktop/src/components/settings/providers/modal/ProviderConfiguationModal.tsx
+++ b/ui/desktop/src/components/settings/providers/modal/ProviderConfiguationModal.tsx
@@ -19,20 +19,7 @@ import { useModelAndProvider } from '../../../ModelAndProviderContext';
 import { AlertTriangle, LogIn } from 'lucide-react';
 import { ProviderDetails, removeCustomProvider, configureProviderOauth } from '../../../../api';
 import { Button } from '../../../../components/ui/button';
-
-const formatErrorMessage = (error: unknown): string => {
-  if (error instanceof Error) {
-    return error.message;
-  }
-  if (typeof error === 'string') {
-    return error;
-  }
-  try {
-    return JSON.stringify(error);
-  } catch {
-    return String(error);
-  }
-};
+import { errorMessage } from '../../../../utils/conversionUtils';
 
 interface ProviderConfigurationModalProps {
   provider: ProviderDetails;
@@ -87,7 +74,7 @@ export default function ProviderConfigurationModal({
         onClose();
       }
     } catch (err) {
-      setError(`OAuth login failed: ${formatErrorMessage(err)}`);
+      setError(`OAuth login failed: ${errorMessage(err)}`);
     } finally {
       setIsOAuthLoading(false);
     }
@@ -130,7 +117,7 @@ export default function ProviderConfigurationModal({
         onClose();
       }
     } catch (error) {
-      setError(formatErrorMessage(error));
+      setError(errorMessage(error));
     }
   };
 
diff --git a/ui/desktop/src/main.ts b/ui/desktop/src/main.ts
index 897430f68154..62dac2ae2ba9 100644
--- a/ui/desktop/src/main.ts
+++ b/ui/desktop/src/main.ts
@@ -28,7 +28,7 @@ import { expandTilde } from './utils/pathUtils';
 import log from './utils/logger';
 import { ensureWinShims } from './utils/winShims';
 import { addRecentDir, loadRecentDirs } from './utils/recentDirs';
-import { formatAppName, errorMessage } from './utils/conversionUtils';
+import { formatAppName, errorMessage, formatErrorForLogging } from './utils/conversionUtils';
 import type { Settings } from './utils/settings';
 import { defaultKeyboardShortcuts, getKeyboardShortcuts } from './utils/settings';
 import * as crypto from 'crypto';
@@ -1116,12 +1116,12 @@ const handleFatalError = (error: Error) => {
 };
 
 process.on('uncaughtException', (error) => {
-  console.error('Uncaught Exception:', error);
+  console.error('Uncaught Exception:', formatErrorForLogging(error));
   handleFatalError(error);
 });
 
 process.on('unhandledRejection', (error) => {
-  console.error('Unhandled Rejection:', error);
+  console.error('Unhandled Rejection:', formatErrorForLogging(error));
   handleFatalError(error instanceof Error ? error : new Error(String(error)));
 });
 
diff --git a/ui/desktop/src/utils/analytics.ts b/ui/desktop/src/utils/analytics.ts
index 91794b5d9ef2..73ee208f4cfe 100644
--- a/ui/desktop/src/utils/analytics.ts
+++ b/ui/desktop/src/utils/analytics.ts
@@ -241,10 +241,10 @@ export function trackPageView(page: string, referrer?: string): void {
 export function trackError(
   errorType: string,
   options: {
-    component?: string; // React component name
-    page?: string; // Current route/page
-    action?: string; // What user was doing
-    stackSummary?: string; // Use getStackSummary() to generate
+    component?: string;
+    page?: string;
+    action?: string;
+    stackSummary?: string;
     recoverable?: boolean;
   } = {}
 ): void {
diff --git a/ui/desktop/src/utils/conversionUtils.ts b/ui/desktop/src/utils/conversionUtils.ts
index 4e6a2fce8a5f..b509ac33b114 100644
--- a/ui/desktop/src/utils/conversionUtils.ts
+++ b/ui/desktop/src/utils/conversionUtils.ts
@@ -22,6 +22,20 @@ export function errorMessage(err: Error | unknown, default_value?: string) {
   }
 }
 
+export function formatErrorForLogging(error: unknown): string {
+  if (error instanceof Error) {
+    return `${error.name}: ${error.message}${error.stack ? `\n${error.stack}` : ''}`;
+  }
+  if (typeof error === 'object' && error !== null) {
+    try {
+      return JSON.stringify(error, null, 2);
+    } catch {
+      return String(error);
+    }
+  }
+  return String(error);
+}
+
 export async function compressImageDataUrl(dataUrl: string): Promise<string> {
   return new Promise((resolve, reject) => {
     const img = new globalThis.Image();