FixtureKit

What it does

FixtureKit is a free, entirely browser-based tool that uses semantic inference to turn TypeScript interfaces or Zod schemas into realistic mock data. Copy as raw TS, JSON, MSW handlers, or Playwright route mocks. Features an Adversarial Mode to stress-test your UI.

Generate fixtures, mocks, and test data from TypeScript and Zod schemas. Runs entirely in your browser. No API calls. No schema leaves your machine.

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