Zod Tutorial: Auto-Generate Schemas & Validate API Responses in TypeScript

Learn how to auto-generate Zod schemas from existing TypeScript types using ts-to-zod — and validate API responses at runtime without writing manual schemas or risking crashes in production.

🛠 In this step-by-step Zod tutorial, you'll see safeParse in action, walk through schema generation, and catch common TypeScript mistakes that break your apps.

🎯 Ideal for TypeScript devs who want safer APIs, fewer crashes, and zero duplicated types.

🔥 What You’ll Learn:
• Zod schema validation (real examples)
• Auto-generating Zod schemas from TS types
• Type-safe API validation with `safeParse`
• Prevent runtime crashes from malformed data

Perfect for:
✔️ TypeScript developers tired of writing duplicate schemas
✔️ Beginners looking for a Zod crash course
✔️ Anyone struggling with runtime API validation

Chapters:
00:00 Introduction to problem
00:38 What is Zod?
00:57 Setup project with typescript, ts-node and zod
02:22 Zod based input validation example
04:49 How to avoid writing zod schemas for existing types by hand
05:37 Ts-to-zod example: Auto generating zod schemas for exported types
07:12 Real world api fetch and schema validation example using generated zod schemas
08:02 Introducing safeParse function of zod schemas
08:51 Limitations of zod/ts-to-zod
09:19 Recap and conclusion

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