Why Generate Types?
Type safety, autocomplete, catch errors at compile-time, document data structures, refactor confidently.
Manual vs Auto-Generation
Manual is tedious and error-prone. Auto-generation saves time, reduces bugs, keeps types in sync.
Generation Tools
Online Generators
Use our TypeScript Type Generator - paste JSON, get interfaces instantly. Options for exports, optional fields.
quicktype
CLI and library. Multiple languages. JSON to TypeScript, Python, Go, etc.
json-schema-to-typescript
Generate from JSON Schema. More control over types. Advanced features.
Interfaces vs Types
Interfaces for objects. Types for unions and primitives. Both work for most cases.
Optional Properties
Use ? for optional fields. Reflect actual data. Prevent undefined errors.
Nested Objects
Generate separate interfaces for nested structures. Better organization and reusability.
Arrays and Unions
Array<Type> or Type[]. Union types for multiple possibilities. string | number.
Zod for Runtime Validation
Generate Zod schemas. Parse and validate at runtime. TypeScript types from Zod.
Best Practices
Keep types separate, use meaningful names, export types, validate runtime data, update with API changes.
CI/CD Integration
Auto-generate on schema changes. Commit generated types. Test type compatibility.
Common Pitfalls
Any types, missing null checks, outdated types, over-complex types.