---
title: Return JSON
description: Return JSON directly from a Worker script, useful for building APIs and middleware.
image: https://developers.cloudflare.com/dev-products-preview.png
---

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> Fetch the complete documentation index at: https://developers.cloudflare.com/workers/llms.txt  
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# Return JSON

Return JSON directly from a Worker script, useful for building APIs and middleware.

If you want to get started quickly, click on the button below.

[![Deploy to Cloudflare](https://deploy.workers.cloudflare.com/button)](https://deploy.workers.cloudflare.com/?url=https://github.com/cloudflare/docs-examples/tree/main/workers/return-json)

This creates a repository in your GitHub account and deploys the application to Cloudflare Workers.

* [  JavaScript ](#tab-panel-12062)
* [  TypeScript ](#tab-panel-12063)
* [  Python ](#tab-panel-12064)
* [  Rust ](#tab-panel-12065)
* [  Hono ](#tab-panel-12066)

JavaScript

```
export default {  async fetch(request) {    const data = {      hello: "world",    };
    return Response.json(data);  },};
```

[Run Worker in Playground](https://workers.cloudflare.com/playground#LYVwNgLglgDghgJwgegGYHsHALQBM4RwDcABAEbogB2+CAngLzbPYZb6HbW5QDGU2AAwBWQQCYAbGIAcARjGCAzMIBcLFm2Ac4XGnwEjxUuQuUBYAFABhdFQgBTO9gAiUAM4x0bqNFsqSmngExCRUcMD2DABEUDT2AB4AdABWblGkqFBgjuGRMXFJqVGWNnaOENgAKnQw9v5wMDBgfARQtsjJcABucG68CLAQANTA6Ljg9paWCZ5IJLj2qHDgECQA3hYkJL10VLwB9hC8ABYAFAj2AI4g9m4QAJTrm1skvLZ388EkDE8vL8f2MBgdD+KIAd0wYFwUQANM8tgBfIgWeEkC4QEAIKgkABKt08VDc9hSblsp2092RiLhSMs6mYmm0uh4-CEokkMnkSmEJVsDicrg8Xh8bSo-kC2lIYQi0QihG06QCWRyMqiZGBZGK1j55SqNTq20azV4rXaqVsUwsayiwDgsQA+qNxtkoip8gtCmkEXT6Yzgsz9GyjJzTMJmJYgA)

TypeScript

```
export default {  async fetch(request): Promise<Response> {    const data = {      hello: "world",    };
    return Response.json(data);  },} satisfies ExportedHandler;
```

Python

```
from workers import WorkerEntrypoint, Responseimport json
class Default(WorkerEntrypoint):    def fetch(self, request):        data = json.dumps({"hello": "world"})        headers = {"content-type": "application/json"}        return Response(data, headers=headers)
```

```
use serde::{Deserialize, Serialize};use worker::*;
#[derive(Deserialize, Serialize, Debug)]struct Json {    hello: String,}
#[event(fetch)]async fn fetch(_req: Request, _env: Env, _ctx: Context) -> Result<Response> {    let data = Json {        hello: String::from("world"),    };    Response::from_json(&data)}
```

TypeScript

```
import { Hono } from "hono";
const app = new Hono();
app.get("*", (c) => {  const data = {    hello: "world",  };
  return c.json(data);});
export default app;
```

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```