Event Monitor

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Event Monitor

Unity event tracing — record who subscribes, unsubscribes, and when events fire — with zero manual instrumentation.

Quick Start
Core concepts

IL Post-Processor

Injects tracking into event add/remove accessors and common invocation call sites after compilation.

Redux-style timeline

Immutable SUB, UNSUB, and INVOKE records with filtering, stats, and export to Plain Text, CSV, JSON, or Markdown.

Live subscribers

Inspect the current graph of listeners per event, with optional time-travel replay of subscriber state.

Optional payloads

Capture invocation arguments when you need them; keep overhead low when you do not.

What is Event Monitor? ​

Event Monitor is a Unity Editor tool for teams that rely on C# events for gameplay, UI, or architecture. It answers questions such as:

Version note

Event Monitor is tested on both Unity 6 LTS (6000.3.7f1, 6000.4.2f1) and Unity 2022.3.62f3. See the compatibility table in Installation.

  • Who subscribed to this event, and from which type and method?
  • When did it fire, and how many handlers were attached at that moment?
  • How did the listener graph evolve over a Play session?

The workflow is inspired by Redux DevTools: an append-only log, derived subscriber state, and time travel to inspect that state at a chosen point in the timeline.

Who is it for? ​

Projects with event-driven code paths where debugging “who listened, and why did this run?” otherwise means breakpoints, logging sprawl, or guesswork.

What it is not ​

Event Monitor is a development-time observability tool inside the Editor. It is not a runtime analytics pipeline, a replacement for Unity Profiler, or a general-purpose logger.

Next steps ​

  • Follow the Quick Start to open the window and read your first records.
  • See Installation for Unity version and package requirements.
  • Browse How-to guides for payloads, ILPP diagnostics, and exports.

Event Monitor — Unity Editor documentation

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