Which languages are supported?

The parser handles stack traces from JavaScript/Node.js, Java, Python, Go, Ruby, C#/.NET and PHP. It auto-detects the language based on the stack trace format.

Can it collapse framework frames?

Yes. The tool identifies frames from common frameworks and libraries (node_modules, java.lang, etc.) and collapses them by default, highlighting only your application code.

Is my stack trace data private?

Yes. All parsing happens in your browser. Stack traces often contain file paths, function names and line numbers that could reveal application architecture, so privacy is critical.

Parse Stack Trace Online Free

Paste a raw stack trace and get a clean, formatted view with highlighted key frames, collapsible framework code and clickable file references. This free tool supports Java, Python, JavaScript, Go and other common languages.

Open Stacktrace Parser

Parsing Example

Raw stack trace:
Error: Cannot read properties of undefined (reading 'id')
    at getUserId (src/services/user.ts:42:18)
    at handleRequest (src/routes/api.ts:15:22)
    at Layer.handle (node_modules/express/lib/router/layer.js:95:5)
    at next (node_modules/express/lib/router/route.js:144:13)

Parsed output:
  Error: Cannot read properties of undefined (reading 'id')
  > src/services/user.ts:42     getUserId
  > src/routes/api.ts:15        handleRequest
    node_modules/express/...     (framework - collapsed)

Common Use Cases

Formatting exception stack traces from bug reports
Highlighting application code frames vs framework internals
Parsing stack traces from error monitoring tools (Sentry, Bugsnag)
Cleaning up stack traces for Slack or Jira tickets

Frequently Asked Questions

Which languages are supported?: The parser handles stack traces from JavaScript/Node.js, Java, Python, Go, Ruby, C#/.NET and PHP. It auto-detects the language based on the stack trace format.
Can it collapse framework frames?: Yes. The tool identifies frames from common frameworks and libraries (node_modules, java.lang, etc.) and collapses them by default, highlighting only your application code.
Is my stack trace data private?: Yes. All parsing happens in your browser. Stack traces often contain file paths, function names and line numbers that could reveal application architecture, so privacy is critical.