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Deploy serverless functions globally in seconds

Cloudflare Workers are fast, elastic, and serverless functions that scale automatically from zero to millions of requests.

Start building for free View docs

Only pay for what you use

Pay only for execution time (CPU time), not idle time spent waiting on I/O.

Near your users, or your data

Deploy once, run in Cloudflare's 335+ cities by default, or use Smart Placement to run near your data, to minimize end-to-end latency.

No cold starts

Don't keep users waiting, or spend your time on prewarming rube-goldberg machines.

Infinite concurrency without the markup

No need to pay for pre-provisioned concurrency. Just scale up based on demand on your big launch days, no matter how many concurrent users you get.

First-class local development

Workers allows you to fully test your changes locally and allow you to get in the flow, ahead of pushing your changes with workerd, our open-source runtime.

Write in JS, TS, Python or Rust

Choose from a template in your language to kickstart building an app.

Serverless architecture, from the ground up: Isolates vs. Containers

Workers are built on unique architecture called isolates. Isolates are an order of magnitude more lightweight, which means they can easily and quickly scale up and down to meet your needs.

Traditional
architecture

Workers v8
isolates

User code

Process overhead

Workers

You can use Workers to:

See real-world examples of Cloudflare Workers

Build scalable APIs

Handle billions of requests with automatic scaling and global deployment. No load balancers, no capacity planning, no regional configuration.

Deploy complete web applications

Ship React, Vue, or Next.js apps integrated backend logic, databases, and storage. Full-stack development without infrastructure management.

Run serverless functions at the edge

Handle authentication, rate limiting, routing, caching logic near your users. Reduce latency and reduce load on your server by offloading processing to Workers.

Run business logic and background jobs

Handle webhooks, process data, and run scheduled tasks with built-in Queues, Workflows, and Cron Triggers. Reliable automation without server babysitting.

Hello World to full-stack on a single integrated platform

Go beyond hello world by connecting to any resources you need — database, storage, browser rendering, images and more with a simple binding.

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export default {  async fetch(request, env) {    const stmt = env.DB.prepare('SELECT * FROM comments LIMIT 3');    const { results } = await stmt.all();
    return new Response(renderHtml(JSON.stringify(results, null, 2)), {      headers: {        'content-type': 'text/html',      },    });  },} satisfies ExportedHandler<Env>;

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async list(): Promise<Todo[]> {    const todos = await this.kv.get(this.todosKey, "json");    if (Array.isArray(todos)) {      todos.sort((a: Todo, b: Todo) => b.createdAt - a.createdAt);    }    return (todos || []) as Todo[];  }
async create(text: string): Promise<Todo> {  const newTodo: Todo = {    id: crypto.randomUUID(),    text,    completed: false,    createdAt: Date.now(),  };  const todos = await this.list();  todos.push(newTodo);  await this.kv.put(this.todosKey, JSON.stringify(todos), {    expirationTtl: 300,  });  return newTodo;}

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export default {  async fetch(request, env) {    const inputs = {      prompt: 'cats vibe coding an application',    };
    const response = await env.AI.run(      '@cf/black-forest-labs/flux-1-schnell',      inputs,    );
    return new Response(response, {      headers: {        'content-type': 'image/png',      },    });  },} satisfies ExportedHandler<Env>;

Deploy with confidence, even on Fridays

Go from localhost to global in seconds

$ █

...or by clicking merge

Cloudflare Workers connects directly to your Git repository, allowing you to deploy however, whenever you want

Go fast, or slow

Workers enables you to instantly deploy to all 330+ cities, or gradually roll out changes to a percentage of your users. If errors spike up, roll back when you need.

Intercom

"

Cloudflare's toolkit is accelerating that movement even faster. Their clear documentation, purpose-built tools, and developer-first platform helped Intercom go from concept to production in under a day. "

Jordan Neill SVP Engineering

Workers Pricing

Serverless functions that run everywhere, instantly. View Compute pricing details

Component

Free

Paid

Requests

Free

100k / day

Paid

$0.30 / million requests

CPU Time

Free

10 ms / request

Paid

$0.02 / million CPU ms

Powerful primitives, seamlessly integrated

Built on systems powering 20% of the Internet, Workers run on the same infrastructure Cloudflare uses to build Cloudflare. Enterprise-grade reliability, security, and performance are standard.

Compute

Browser Run Automated browsers

Containers Any language, anywhere

Durable Objects Stateful compute

Sandboxes Secure code execution

Workers Global serverless functions

Workers for Platforms Programmable Platform Solutions

Workflows Process orchestration

Storage

Artifacts Git-native versioned storage

D1 Serverless SQL

Basin Ingest, catalog & query data

Hyperdrive Global databases

K2 Publish and subscribe to durable, ordered event streams

Queues Message processing

R2 Egress-free storage

KV Ultra-fast key-value storage

Agents Build stateful AI agents

AI Gateway AI observability

AI Search Instant retrieval

Vectorize Vector database

Workers AI Edge AI models

SASE / Zero Trust

SASE Cloudflare SASE platform

Access Zero trust access to private resources

CASB SaaS and cloud posture

Data Loss Prevention Protect sensitive data

Gateway Web filtering

Browser Isolation Secure web browsing

WAN Cloud-delivered networking

Email Security Phishing protection

Security

DDoS Protection Mitigation Solutions

Rate Limiting Abuse prevention

SSL Secure Your Site with SSL

Turnstile A CAPTCHA Replacement Solution

WAF Web Application Firewall

Magic Transit DDoS Protection for Networks

Client-Side Security Prevent browser supply chain attacks

Bot Management Block bad bots

Network & Content Delivery

CDN Faster delivery & caching

DNS Fast DNS

Load Balancing Zero downtime

TURN / SFU Real-time infra

Analytics Web Performance & Security

Build without boundaries

Join thousands of developers who've eliminated infrastructure complexity and deployed globally with Cloudflare. Start building for free — no credit card required.

Start building for free

View docs

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