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极速赛车 Deno v1.39.2
Free & open source
Next-generation JavaScript runtime

Deno is the most productive, secure, and performant JavaScript runtime for the modern programmer.
Trusted by major organizations
Slack
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GitHub
Supabase
Rating

90k+
Stars on GitHub

Community

250k+
Active developers using Deno

Ecosystem

2M+
Community modules

Upgrade from Node.js to Deno

Whether you deploy with our lightning-fast Deno Deploy or on other cloud providers, Deno streamlines your experience.

Deno

  • Checkmark iconMillions of community modules
  • Checkmark iconBuilt on V8 JavaScript engine
  • Checkmark iconBuilt with web standard APIs
  • Checkmark iconRuntime security by default
  • Checkmark iconBuilt-in TypeScript, JSX, formatter, linter, and test
  • Checkmark iconEasily embeddable with Rust and Tokio

Node

  • Checkmark icon
  • Checkmark icon
  • Minus icon
  • X icon
  • X icon
  • X icon

Develop 10× faster

Don’t let anything slow you down with Deno

Code linter
$ deno lint --watch

Deno ships with a built-in code linter to help you avoid bugs and code rot.

Learn more
Standalone executables
Deno.serve(() => new Response("Hello!"));
$ deno compile --allow-net server.ts

$ ./server
Listening on http://localhost:8000/

Instantly create standalone executables from your Deno program. It even supports cross-compiling for other platforms!

Learn more
Test runner
$ deno test main_test.ts
Deno.test("1 + 2 = 3", () => {
  const x = 1 + 2;
  console.assert(x == 3);
});

Deno provides a test runner and assertion libraries as a part of the runtime and standard library.

Learn more
Code formatter
$ deno fmt --line-width=120

Deno's built-in code formatter (based on dprint) beautifies JavaScript, TypeScript, JSON, and Markdown.

Learn more
Deno KV logo

Seamless persistence with Deno KV

The Deno runtime ships with Deno KV, a key/value database designed for globally distributed applications.

Go from development to production on Deno Deploy with no API keys or infrastructure to configure.

Built for the modern web

Deno actively participates in TC39 and WinterCG, to help move the web forward. We're committed to building the future of JavaScript collaboratively and in the open.

Consistent code from browser to backend

Deno provides web standard APIs whenever possible, maximizing code reuse between browser and server and future-proofing your code.
WorkerMessageEventWritableStreamDefaultControllerstructuredCloneDecompressionStreamCompressionStreamsetIntervalPromiseRejectionEventclearIntervalBlobfetchbtoalocalStorageNavigatorclearTimeoutReadableStreamDefaultControllerResponse.json()EventTargetcachesCacheStorageMessagePortLocationDedicatedWorkerGlobalScopeWebSocketqueueMicrotaskCryptoKeyErrorEventPerformanceMarkWorkerNavigatorReadableStreamBYOBRequestTextDecoderWorkerLocationTextEncoderStreamReadableByteStreamControllerTransformStreamFileCustomEventEventperformanceDOMExceptionReadableStreamBYOBReadercryptoCloseEventURLPatternPerformanceEntryconsolewindow.close()CryptoRequestReadableStreamStorageWebAssemblyTextDecoderStreamURLSearchParamsProgressEventFileReaderByteLengthQueuingStrategyBeforeUnloadEventTextEncoderatobwindow.alert()setTimeoutPerformanceHeadersWorkerGlobalScopeAbortSignalFormDataResponseMessageChannelURLBroadcastChannelWindowTransformStreamDefaultControllerSubtleCryptoCacheWritableStreamAbortControllerReadableStreamDefaultReaderPerformanceMeasureWritableStreamDefaultWriter
server.ts
import express from "npm:express@4";

const app = express();

app.get("/", function (_req, res) {
  res.send("hello");
});

app.listen(3000, () => {
  console.log("Express listening on :3000");
});
$ deno run --allow-net --allow-read --allow-env server.js

Millions of community modules

Deno is backwards compatible with Node.js built-in APIs and over two million modules on npm. Bring the best of the Node.js ecosystem with you to Deno.

High performance networking

Out of the box support for:
  • HTTPS (encryption)
  • WebSockets
  • HTTP2
  • Automatic response body compression
server.ts
Deno.serve((req) => new Response("Hello world"));

Bigger is better

Throughput, requests per sec

200059
95879
Deno
Node

Built for the cloud

Whether you deploy with our lightning-fast Deno Deploy or on other cloud providers, Deno streamlines your experience.

Deno Deploy

The easiest way to host your Deno projects.

  • Checkmark iconGlobally distributed
  • Checkmark iconDeploy in seconds
  • Checkmark iconBuilt-in key/value database
  • Checkmark iconIntegrate with GitHub for CI/CD
  • Checkmark iconRun static sites, apps, and edge functions
  • Checkmark iconNo config needed
  • Checkmark iconOne-click immediate rollbacks

Secure by default

A program run with Deno has no file, network, or environment access unless explicitly enabled.

Controlled access

Deno restricts access to sensitive runtime APIs by default, protecting your infrastructure from malicious code.

Configure granular access to the filesystem, network, and system environment, so your code only has access to the resources it needs.

Dive into Deno code

Explore Deno code, use available resources and get involved in the community.
function handler(_req: Request): Response {
  return new Response("Hello, World!");
}

Deno.serve(handler);

Code examples

Fresh

Fresh is a modern web framework, designed from the ground up for the Deno runtime on edge servers.

  • Checkmark iconBuilt for speed, reliability, and simplicity
  • Checkmark iconJust-in-time rendering at the edge
  • Checkmark iconIsland-based client hydration
  • Checkmark iconZero runtime overhead

SaaSKit

Built on top of Fresh, the SaaSKit template app includes authentication, billing, and more.

  • Checkmark iconUser authentication with oAuth 2.0
  • Checkmark iconRecurring payments implemented with Stripe
  • Checkmark iconSessions and authorization pre-built
  • Checkmark iconFast, lightweight persistence with Deno KV

Our vibrant community

“I know this was gonna happen! Deno is truly building the fastest, most secure and personalizable JS runtime!”
Manu (Qwik)
“Deno's security model is PERFECT for this type of script. Running a script from a rando off the internet? It asks for read access to only the CWD and then asks for access to the file it wants to write to. 👏”
Wes Bos
“I really think Deno is the easiest and most capable JS runtime. URL imports are slept on.”
Atalocke
“npm packages in Deno 👀 That’s an exciting development for those of us building at the edge.”
Jason Lengstorf
“This Deno thing is fast, no doubt about it. #denoland”
Poorly Funded Snob
“Deno: I have to use the browser APIs cause they are everywhere, and everywhere is my target runtime (the web). The runtime that tries to mirror browser APIs server side makes my life easiest.”
Taylor Young
“Deno is fantastic. I am using it to level up a bit in terms of JavaScript and TypeScript and it is the easiest way to get going. Their tooling is like 100x simpler than all the usual Node stacks.”
Stefan Arentz

Ready to get started with Deno?