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  1. Products
  2. Workers
  3. Examples
  4. Return JSON

Return JSON

Try in Workers Playground
Return JSON directly from a Worker script, useful for building APIs and middleware.
 Run Worker
export default {
  async fetch(request) {
    const data = {
      hello: "world",
    };


    return Response.json(data);
  },

};

export default {
  async fetch(request): Promise<Response> {
    const data = {
      hello: "world",
    };


    return Response.json(data);
  },

} satisfies ExportedHandler;

from js import Response, Headers
import json


def on_fetch(request):
    data = json.dumps({"hello": "world"})
    headers = Headers.new({"content-type": "application/json"}.items())
    return Response.new(data, headers=headers)