Overview

@nest-openapi/serializer High‑performance response serialization based on your OpenAPI 3.x spec.

• Spec‑driven — The OpenAPI spec is the contract; serializers are generated from it.
• Fast by default — Uses fast-json-stringify with caching and optional pre‑compilation.
• NestJS‑native — Auto serializes with per‑route opt‑out and overrides.

Install

npm i @nest-openapi/serializer

Quick Start

// app.module.ts
import { Module } from "@nestjs/common";
import { OpenAPISerializerModule } from "@nest-openapi/serializer";
import * as openApiSpec from "./openapi.json";

@Module({
  imports: [
    OpenAPISerializerModule.forRoot({
      specSource: { type: "object", spec: openApiSpec },
      precompileSchemas: true,
      responseSerialization: { enable: true, skipErrorResponses: true },
    }),
  ],
})
export class AppModule {}

That's it. Successful responses are automatically serialized according to the OpenAPI response schema and best‑match content-type.

Framework Support

Works with both Express and Fastify adopters.