TypeMorph vs openapi-typescript
Updated
openapi-typescript generates highly accurate TypeScript types from OpenAPI specs using the full spec structure — discriminated unions, $ref resolution, and path/component typing. TypeMorph takes OpenAPI or raw JSON and converts it to 160+ output formats including Zod v4, Go structs, Rust, Prisma, and AI tool definitions. Use openapi-typescript when you need production-grade TypeScript types from a maintained OpenAPI spec; use TypeMorph when you need multiple output formats or lack a spec.
openapi-typescript (maintained by the openapi-ts organization) is the leading tool for generating TypeScript from OpenAPI 3.x specs. It produces idiomatic TypeScript with full $ref resolution and discriminated unions. TypeMorph overlaps on OpenAPI → TypeScript but extends to 160+ output formats and works even when you have only a raw JSON response rather than a full spec.
Use TypeMorph if
You need multiple output formats from OpenAPI (Zod, Go, Rust, Prisma…), you are working from raw JSON responses without a full spec, or you want semantic validators (email/uuid/url) added to your Zod output.
Try TypeMorph freeUse openapi-typescript if
You have a maintained OpenAPI 3.x spec and need production-grade TypeScript types with full $ref resolution, discriminated unions, and path-level type safety for fetch clients.
Visit openapi-typescriptFeature Comparison
| Feature | TypeMorph | openapi-typescript |
|---|---|---|
| OpenAPI → TypeScript | ||
| Full $ref / allOf / oneOf resolution | partial | |
| Discriminated union types | ||
| Path / operation typed fetch client | ||
| OpenAPI → Zod v4 | ||
| OpenAPI → Go / Rust / Python / Java | ||
| OpenAPI → Prisma / Drizzle / SQL | ||
| OpenAPI → MCP / OpenAI / Vercel AI tool | ||
| Raw JSON input (no spec required) | ||
| Semantic format inference (email/uuid) | ||
| Schema Quality Score | ||
| Web UI (no install) | ||
| VS Code Extension | ||
| CLI tool (npm) | ||
| Free & open source |
Where TypeMorph stands out
- 160+ output formats from the same OpenAPI spec: Zod v4, Go, Rust, Python, Prisma, SQL, MCP tool, OpenAI function, Vercel AI SDK, and more
- Works with raw JSON responses when no OpenAPI spec exists
- Semantic format inference: email fields become z.email(), uuid → z.uuid(), url → z.url()
- Web UI — paste an OpenAPI spec or JSON and get any output format instantly, no install
- API drift detection: typemorph check monitors live endpoints without a spec
- VS Code Extension — convert any file with Ctrl+Shift+T
Where openapi-typescript stands out
- Best-in-class TypeScript fidelity from OpenAPI: full $ref resolution, allOf/oneOf/anyOf, discriminated unions
- Generates typed fetch clients (openapi-fetch) with path-level request and response types
- Handles OpenAPI 3.0 and 3.1, including Webhooks and complex security schemes
- Large ecosystem: supports openapi-fetch, openapi-react-query, and Astro integrations
- Active development and wide community adoption
Frequently asked
Does openapi-typescript generate Zod schemas?
openapi-typescript focuses on TypeScript types. There are community plugins to derive Zod from its output. TypeMorph converts OpenAPI directly to Zod v4 with semantic validators (z.email(), z.uuid()) in one step.
Can TypeMorph replace openapi-typescript for TypeScript generation?
For basic TypeScript interfaces from OpenAPI components, yes. For path-level typed fetch clients and full discriminated union support, openapi-typescript is more complete. They serve slightly different needs.
What if I do not have an OpenAPI spec — can I still use TypeMorph?
Yes. TypeMorph infers a schema directly from a raw JSON response. Paste or pipe any API response and get TypeScript, Zod, or any other format immediately — no spec required.
Can TypeMorph generate Go or Rust from an OpenAPI spec?
Yes. TypeMorph accepts OpenAPI 3.x as input and can output Go structs, Rust structs, Python dataclasses, Java classes, Prisma models, and 160+ other formats from the same spec.