Tiny debugging utility.

Flamegraph profiling.

Node.js is running but you don't know why?

Write memory leak tests.

Post-mortem analysis tool which allows you to inspect objects and get insights from a crashed Node.js process.

Trace API calls and monitor API performance, health, and usage metrics.

Instrument and trace your code, see all function calls, arguments, return values, as well as the time spent in each function.

Starts a REPL at runtime that has access to all variables.

Enhance an error stacktrace with code excerpts and other goodies.

Capture different CPU, memory, and other profiles for your app in Chrome DevTools friendly format.

Manages DevTools debugging workflow.

Well-formatted and improved trace system calls and signals.

Minimalistic and zero-dependencies StatsD client.

Instrumentable streams mix-ins to inspect a pipeline of streams.