Launching today

Mock and Match

Launching today

Fake test data & JSON tools, 100% in your browser

3 followers

Fake test data & JSON tools, 100% in your browser

3 followers

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Mock and Match is a free, 100% client-side toolkit for developers: generate realistic fake test data (CPF, CNPJ, UUIDs, emails, credit cards and 50+ field types) with a visual schema builder, export to JSON/CSV/SQL, and convert between JSON, YAML, XML, TypeScript, Zod, JSON Schema and TOON — plus a JSON formatter/minifier. No signup, no data ever leaves your browser.

Free

Launch tags:Web App•API•Developer Tools

Launch Team / Built With

Maker

📌

Hey hunters 👋 I built Mock and Match because every time I needed realistic-but-fake data to test a form (a valid-looking CPF, a working UUID, a fake-but-formatted credit card), I ended up either hand-writing fixtures or fighting some clunky tool that wanted my email or an account first. So it's: a schema builder for mock/test data (CPF/CNPJ with real check-digit validation, credit cards, emails, dates, 50+ field types), plus a JSON ↔ TypeScript/Zod/YAML/XML converter and a JSON formatter — all running 100% in your browser, nothing ever touches a server. Free, no signup. Would love your feedback — especially which field types or conversions you'd want next.

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1d ago