tools / stack-trace
Stack Trace Explainer
Paste a stack trace to identify the error, root frame, app frames, dependency frames, and likely cause.
TypeError
Cannot read properties of undefined (reading 'id')
A value is undefined or null before property access or method call. Check guards, API response shape, and optional fields near the first app frame.
3
Frames
2
App frames
1
Dependencies
Root application frame
getUser
/app/src/users.ts:42
Frames
getUserapp
/app/src/users.ts:42
async GETapp
/app/src/api/users/route.ts:12
<anonymous>dependency
node_modules/next/dist/server.js:10
DebugTools product
Stack Trace Explainer
Stack Trace Explainer is a focused DebugTools mini-product for developers. Extract error type, root frame, app frames, dependencies, and likely cause from pasted stack traces.
Use cases
- Find the exception type and first app-owned frame.
- Separate framework frames from the code path you should inspect.
- Generate a small checklist from pasted stack traces.
How it works
- Paste or load the snippet you want to inspect in Stack Trace Explainer.
- Run the tool in the browser and review the highlighted output.
- Copy, export, or turn the result into the next debugging step.
Privacy
- Stack Trace Explainer is local-first. The core workflow runs in your browser and does not require sending pasted content to DebugTools servers.
This tool history
Recent Stack Trace sessions
Only visits for this tool are shown. Pasted content, tokens, request bodies, and logs are not stored here.
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