{"library":"workerd","type":"library","category":null,"description":"Cloudflare's `workerd` is an open-source JavaScript/WebAssembly server runtime, built on the same core technology that powers Cloudflare Workers. It provides a local execution environment for developing and testing serverless applications that replicate the Cloudflare Workers platform. The current stable version, `v1.20260421.1`, follows a `v1.YYYYMMDD.X` daily release cadence, reflecting continuous integration and frequent updates with features and bug fixes. Key differentiators include its high compatibility with the Cloudflare Workers ecosystem, enabling seamless local development and deployment, and its foundation on the proven, high-performance Cloudflare infrastructure. Unlike traditional Node.js runtimes, `workerd` is designed for a secure, isolated, and highly concurrent serverless model, with built-in support for web standards like `fetch` and `Durable Objects`.","language":"javascript","status":"active","version":"1.20260421.1","tags":["javascript"],"last_verified":"Wed May 27","install":[{"cmd":"npm install workerd","imports":["/// <reference types=\"workerd\" />","import { workerd } from 'workerd';\nconst { unsafe } = workerd;","import type { workerd } from 'workerd';"]},{"cmd":"yarn add workerd","imports":[]},{"cmd":"pnpm add workerd","imports":[]}],"homepage":"https://workerd.dev","github":"https://github.com/cloudflare/workerd","docs":null,"changelog":null,"pypi":null,"npm":"https://www.npmjs.com/package/workerd","openapi_spec":null,"status_page":null,"smithery":null,"compatibility":{"summary":{"python_range":"18–22","success_rate":0,"avg_install_s":null,"avg_import_s":null,"wheel_type":null},"url":"https://checklist.day/v1/registry/workerd/compatibility"}}