Live demos

Try the tools directly in your browser. These demos run in StackBlitz (a third-party service) — nothing is installed on your computer.

Interactive demos

See how Mock Service Worker intercepts API calls in a Vitest test suite, returning fake data without hitting real endpoints.

Try MSW + Vitest Live →

Build reusable test data factories with Faker.js to generate realistic user objects, products, and more for your test suites.

Try Faker.js Factories Live →

Record and replay HTTP mocks with Mockifyer. JSON-based mocks stored in your repo, fully offline testing with pre-recorded responses.

Try Mockifyer + Vitest Live →

Disclosure: Mockifyer is built by this site's maintainer.

The examples use https://demo.devxtools.dev, a free shared fake REST API for testing and demos. No authentication required.