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tools / android-logcat

Android Logcat Analyzer

Paste Android Logcat output to identify fatal exceptions, ANRs, native crashes, process restarts, and device clues.

P0Mobile DebuggingHigh severity
100
debug signal score
3 signals

3 signals detected. Start with fatal exception.

Detected signals

Fatal exception

The app crashed on a Java/Kotlin thread.

Start at the first app-owned frame below the exception message and inspect lifecycle/state assumptions.

ANR detected

The app blocked the main thread or failed to respond in time.

Check main-thread work, locks, slow I/O, startup paths, and strict-mode violations.

Java/Kotlin exception cause

The stack includes a specific exception cause.

Group by exception type and first app frame before looking at framework frames.

Highlighted lines
line 1
E AndroidRuntime: FATAL EXCEPTION: main
Fatal exception
line 3
java.lang.NullPointerException
Java/Kotlin exception cause
line 4
Caused by: java.lang.IllegalStateException
Java/Kotlin exception cause
line 5
ANR in com.example.app
ANR detected
Fix checklist
Start at the first app-owned frame below the exception message and inspect lifecycle/state assumptions.
Check main-thread work, locks, slow I/O, startup paths, and strict-mode violations.
Group by exception type and first app frame before looking at framework frames.
Capture full exception block and process/package line.
Record device, Android version, ABI, app version, and build type.
Separate app frames from framework frames.

DebugTools product

Android Logcat Analyzer

Android Logcat Analyzer is a focused DebugTools mini-product for developers. Paste Android Logcat output to identify fatal exceptions, ANRs, native crashes, process restarts, and device clues.

Use cases

  • Review mobile logs, crashes, startup, network, and device-specific clues.
  • Separate JavaScript, native, runtime, and platform evidence.
  • Capture a focused debugging report for mobile issue triage.

How it works

  • Paste or load the snippet you want to inspect in Android Logcat Analyzer.
  • Run the tool in the browser and review the highlighted output.
  • Copy, export, or turn the result into the next debugging step.

Privacy

  • Android Logcat Analyzer is local-first. The core workflow runs in your browser and does not require sending pasted content to DebugTools servers.

This tool history

Recent Android Logcat sessions

Only visits for this tool are shown. Pasted content, tokens, request bodies, and logs are not stored here.

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