Mixpanel Toolkit

Mixpanel Toolkit is a local tracking-plan builder and analytics sandbox for designing Mixpanel-style events. Product managers can start from an event spec, engineers can paste raw JSON, and QA teams can validate payloads, simulate events, inspect debugger rows, generate implementation snippets, and export a checklist without sending data to a server.

Use Form Builder to define the event name, trigger, category, identity setup, code target, breakdown property, and property table, or switch to JSON Payload to paste an engineer-authored Mixpanel payload. Validate the generated payload, add it to the simulation, expand event rows, review validation issues, and export a Markdown tracking plan or JSON event stream.

All totals are derived from the local raw events array: event hits, unique users, event trends, property breakdown coverage, optional funnel steps, optional revenue totals, and retention estimates. Generic events are treated as complete when their own payload and spec are valid; advanced previews only become active when the event data supports them.

The validator catches invalid JSON, missing event names, missing identity fields, duplicate or non-snake-case property keys, malformed revenue properties when relevant, naming drift, inconsistent property types, funnel gaps when relevant, low breakdown coverage, identity fragmentation, and mixed currencies. The code panel can generate Mixpanel snippets for JavaScript, TypeScript, React, Next.js, Vue, Nuxt, Svelte, Node.js, wrapper functions, Jest, and Vitest.

This tool never calls the Mixpanel API, never asks for a project token, and never uploads payloads to a server. Mock data is structural and deterministic, not production analytics data, so compare the exported checklist with real Mixpanel Live View after implementation.