validator-gen

name	validator-gen
description	Generate Zod and Yup schemas from TypeScript types. Use when adding validation.

Validator Generator

You have TypeScript types but need runtime validation. This generates Zod or Yup schemas from your types.

One command. Zero config. Just works.

Quick Start

npx ai-validator ./types/user.ts

What It Does

• Reads TypeScript types
• Generates Zod or Yup schemas
• Matches your type definitions
• Includes helpful error messages

Usage Examples

# Generate from types file
npx ai-validator ./types/user.ts

# Yup instead of Zod
npx ai-validator ./types/product.ts --library yup

Best Practices

• Keep types and validators in sync - regenerate when types change
• Add custom messages - users need clear errors
• Validate at boundaries - API inputs, form data
• Test edge cases - empty strings, nulls, etc.

When to Use This

• Adding validation to existing types
• Keeping types and validators synced
• Migrating between validation libraries
• Learning schema patterns

Part of the LXGIC Dev Toolkit

This is one of 110+ free developer tools built by LXGIC Studios. No paywalls, no sign-ups, no API keys on free tiers. Just tools that work.

Find more:

• GitHub: https://github.com/LXGIC-Studios
• Twitter: https://x.com/lxgicstudios
• Substack: https://lxgicstudios.substack.com
• Website: https://lxgicstudios.com

Requirements

No install needed. Just run with npx. Node.js 18+ recommended. Needs OPENAI_API_KEY environment variable.

npx ai-validator --help

How It Works

Parses your TypeScript types and generates equivalent validation schemas. Handles complex types, optional fields, and nested objects.

License

MIT. Free forever. Use it however you want.