TypeScript, Zod, and Next.js guides
Practical, copy-ready guides for Zod schemas, JSON Schema and OpenAPI conversion, TypeScript config, and Next.js metadata workflows. Every guide is browser-first and links back to the matching FrameworkKit tool.
All guides
TypeScript to Zod: Convert Interfaces and Type Aliases
Convert TypeScript interfaces and type aliases into Zod schemas, understand ts-to-zod limits, and review generated validation code before production.
Zod API Validation Guide: Requests, Responses, parse, safeParse
Validate API requests, responses, fetch results, route params, and errors with Zod parse and safeParse patterns in TypeScript.
Zod parse vs safeParse: When to Use Each in TypeScript
Learn when to use Zod parse, safeParse, parseAsync, and safeParseAsync for TypeScript validation, API boundaries, forms, and error handling.
Zod safeParse: Return Type, Errors, and Examples
Use Zod safeParse to validate unknown data without throwing, narrow success and error results in TypeScript, and choose safeParseAsync when validation is asynchronous.
Zod refine vs superRefine: Custom Validation Examples
Use Zod refine and superRefine for custom validation, async checks, password confirmation, field-level error paths, and rules that do not belong in JSON Schema.
Zod nativeEnum in Zod 4: Migrate to z.enum
Migrate Zod 3 nativeEnum usage to Zod 4 z.enum, validate TypeScript enums and enum-like objects, and avoid common enum value mistakes.
Use JSON to Zod for Form Validation
Generate a starter Zod schema from a form payload and refine it for client or server validation.
Zod safeParse Error Messages in TypeScript
Format Zod safeParse errors into readable TypeScript field errors, API responses, logs, and UI messages without throwing.
Zod to OpenAPI: Generate Swagger Docs from Zod Schemas
Generate OpenAPI and Swagger documentation from Zod schemas, compare zod-to-openapi package workflows, and choose OpenAPI 3.0 or 3.1 for TypeScript APIs.
Zod to JSON Schema for OpenAPI
Convert Zod schemas into OpenAPI-compatible JSON Schema output for API documentation, SDK generation, and contract workflows.
Zod + AJV: Convert Zod to JSON Schema and Validate with Ajv
Use Zod with AJV by converting supported Zod schemas to JSON Schema, choosing the right Ajv draft, compiling validators, and avoiding unsupported Zod features.
Fastify Zod Validation: Requests, Responses, and OpenAPI
Use Zod with Fastify request validation, response schemas, type providers, JSON Schema conversion, and OpenAPI documentation without duplicating API contracts.
Zod to TypeScript: z.infer, z.input, z.output, and zod-to-ts
Generate TypeScript types from Zod schemas with z.infer, z.input, z.output, and the zod-to-ts package, and choose the right direction for schema generation.
Zod to JSON Schema Examples
Practical examples for converting Zod object, enum, union, optional, nullable, array, and nested schemas.
Next.js Metadata API Examples: Static Metadata, generateMetadata, Open Graph
Generate static metadata, generateMetadata functions, metadataBase, canonical URLs, Open Graph fields, and Twitter cards for Next.js App Router pages.
Open Graph Tags in Next.js: Metadata API Examples for Social Previews
Create Open Graph metadata, Twitter cards, canonical URLs, and social preview images for Next.js App Router pages.
How to Set a Canonical URL in Next.js (App Router)
Set canonical URLs in the Next.js App Router with alternates.canonical and metadataBase, including dynamic routes, query parameters, and common mistakes to avoid.
Prisma Schema to Zod: Generate Validation Schemas from Models
Convert Prisma schema models and enums into Zod validation schemas, map scalar and relation fields, and decide between an online converter and the zod-prisma-types generator.
Next.js App Router Route Map: Pages, Route Handlers, and Dynamic Params
Generate and audit a Next.js App Router route map with pages, layouts, route handlers, route groups, dynamic params, catch-all routes, and typed route hints.
Validate Route Params in Next.js App Router with Zod
Validate Next.js App Router params and searchParams with Zod before using dynamic segments, route handlers, redirects, or API queries.
Tailwind to CSS Converter Examples: Utilities, Variants, and Responsive CSS
Convert Tailwind utility classes into readable CSS examples for layout, spacing, typography, colors, hover and focus states, responsive variants, and unsupported classes.
tsconfig for Next.js
Generate a strict TypeScript config for a Next.js App Router project.
tsconfig for Vite
Generate a TypeScript config starter for Vite React and modern browser apps.
TypeScript Strict Mode Config
Understand when to enable strict mode and how to generate a strict tsconfig starter.
moduleResolution bundler vs node16 in TypeScript
Choose TypeScript moduleResolution settings for bundler-based apps, Node ESM, libraries, monorepos, package exports, and extensionless imports.
OpenAPI to Zod Validation
Generate Zod schemas from OpenAPI components and validate API boundaries in TypeScript.
Swagger to Zod for TypeScript
Convert Swagger/OpenAPI JSON schema components into Zod validators for TypeScript projects.
OpenAPI to Zod for tRPC: Contract-First Validation in TypeScript
Use OpenAPI schemas with Zod validators around tRPC-style procedures when a TypeScript app needs contract-first API validation.
Fix Zod Parse Errors on Nullable OpenAPI Fields
Debug Zod parse errors when OpenAPI nullable fields, optional properties, and OpenAPI 3.0 versus 3.1 schema output do not match runtime API payloads.
JSON Schema to Zod
Convert JSON Schema documents to Zod validators: map keywords, resolve $ref and $defs, and review unsupported keyword diagnostics.
openapi-zod-client Alternatives
Compare openapi-zod-client with browser-based OpenAPI to Zod conversion and manual schemas, and choose the right workflow.