Advanced Console Errors Test
The Advanced Console Errors Test extends the basic Console Errors Test with full stack traces, third-party attribution per origin, CSP violation breakdowns and structured grouping by error type.
- Results in seconds
- Pass / fail + fix guidance
- No account required
The Advanced Console Errors Test extends the basic Console Errors Test with full stack traces, third-party attribution per origin, CSP violation breakdowns and structured grouping by error type. It is the right tool when you have a known issue and need to dig into the cause, where the basic Console Errors test is the right tool for ongoing hygiene.
What This Tool Checks
- Full stack traces for every uncaught exception
- Third-party attribution by origin
- CSP violation reports with violated directive
- Error grouping by message and stack
- Frequency / dedupe count across page lifecycle
- Source maps applied where available
Why It Matters for SEO
Basic console hygiene catches the obvious. Deep diagnostics catch the subtle: race conditions, partial third-party failures, CSP edge cases. The advanced view is also the easiest way to attribute errors to a specific vendor (Intercom, GTM, Sentry SDK) so you can engage their support with concrete evidence.
How to Fix It
Walk the full stack-trace report and fix or report each unique error. Apply source maps so traces are readable. For CSP violations, either tighten code to comply or expand the policy with the specific source needed. Use error counts to prioritise — high-frequency errors hit more users.
How It Works
Headless Chrome captures runtime exception events with full stack traces, applies source maps when discoverable, then groups errors by message + top-frame for deduplication. Third-party origins are surfaced separately so you can prioritise first-party fixes.
Common Mistakes to Avoid
- Reading errors without stack traces (cannot find the source)
- Not running source maps so minified stack traces are unreadable
- Treating dedupe counts as low priority just because the message is familiar
- Forgetting that third-party errors still affect your users
- Skipping CSP violation reports because they look noisy
Quick Checklist
- Source maps applied to make stack traces readable
- Every unique first-party error fixed
- Third-party errors reported to vendors
- CSP violations triaged and resolved
- Production error monitor wired up for ongoing visibility
Put your whole site on autopilot — SEO and AI search
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Basic for ongoing hygiene and quick smoke tests. Advanced when you have a known issue and need stack traces, attribution and grouping to dig into the root cause.
Apply source maps. Tools like Sentry handle this automatically; in DevTools the Sources panel can apply maps if they are reachable. Keep source maps server-side and authenticated for security.
Identifying which third-party script (Intercom, Google Tag Manager, Hotjar) caused an error. Lets you fix or replace the right vendor without guessing.
Yes. An error firing once per page is annoying; the same error firing 50 times per page burns CPU and degrades UX. High-count errors usually deserve priority.
Indirectly. Reducing JS errors improves real-user experience, INP and engagement signals — all of which feed Google's page-experience ranking signal.