Console errors, on the page.

A Chrome extension that shows JavaScript errors as toasts. Useful when you don't have DevTools open.

Free · No account · No config required

Add to ChromeView on GitHub
Catchy demo — console error toast notification

What it does

  • Stays dormant until something goes wrong.
  • Patches console.error, window.onerror, and promise rejections.
  • Shows a toast on the page when something fires.
  • Works on your projects and on any site you visit.

How it works

  1. 1Install from the Chrome Web Store.
  2. 2Browse normally — nothing to configure.
  3. 3A toast appears when something fires.
  4. 4Click to see the full error or dismiss.

Features

Free
No account, no subscription.
All entry points covered
Patches console.error, window.onerror, and unhandled promise rejections.
Duplicate errors are grouped
Same error firing repeatedly shows once.
Per-site toggle
Enable or disable from the extension popup per domain.
Doesn't affect the page
Runs in a Shadow DOM. No interference with layout or scripts.
No data collected
Runs entirely in your browser. Nothing is sent anywhere.
Customizable
Position, duration, max toasts, and ignored patterns — from the options page.