JSON to TypeScript & Zod Converter – Schema & Interface Generator
// Paste JSON on the left to generate TypeScript / Zod types...
Why Generate TypeScript Interfaces & Zod Schemas Offline?
Modern frontend development heavily relies on end-to-end type safety. Manually transcribing backend REST API or GraphQL responses into TypeScript interfaces is tedious and prone to typos that trigger runtime bugs. Furthermore, Zod schemas allow runtime schema validation, preventing malformed external payloads from crashing production apps.
Zero-Knowledge Client-Side Safety
API responses and database exports frequently contain sensitive data—PII, email addresses, password hashes, or confidential business metrics. Using online converters that transmit JSON to remote cloud servers violates enterprise cybersecurity policies (SOC 2, GDPR, HIPAA). Our tool runs 100% locally in your browser memory with zero server round-trips.
Supported TypeScript and Zod Features
- Nested Object Extraction: Automatically extracts nested objects into standalone, modular child interfaces.
- Primitive Type Inference: Correctly identifies
string,number,boolean,null, and array primitives (e.g.string[]). - Zod Validation Integration: Automatically maps fields to
z.string(),z.number(),z.boolean(), andz.array()with.nullable()and.optional()modifiers.
Frequently asked questions
Can this converter handle nested JSON objects and arrays?
Yes! Deeply nested JSON structures are parsed recursively. Child objects are automatically split into clean, PascalCase sub-interfaces (e.g. UserProfile, AccountSettings) for clean code architecture.
What is the advantage of using Zod with TypeScript?
TypeScript interfaces only provide compile-time type safety—they disappear entirely in compiled JavaScript. Zod executes at runtime, inspecting real API payloads and throwing descriptive validation errors if a backend changes a field type.
Is any of my JSON uploaded or logged?
Never. Parsing executes entirely inside your browser's local JavaScript engine. Disconnect your internet connection and the tool functions with 100% functionality.