Cloudflare Workers
Run code at the edge, deliver powerful web extensibility
Increased security by applying custom security rules and filtering logic at the edge to detect malicious bots and prevent them from consuming resources.
Improve the user experience by incorporating more personalization and interactivity into static HTML pages with dynamic requests being run at the edge.
Lower operational costs by shifting more operational processes and request handling to the edge to improve cache hit rate and reduce bandwidth costs.
Already a customer? Activate Today
Chief Technology Officer at npm
The application consumer landscape is changing
Prior to Cloudflare Workers, there were two main places where developers could deploy code: front-end code running on an end user’s device, or back-end code running in a central data center. Both have their drawbacks. Cloudflare Workers gives developers a third place to deploy their code close to their customers — at the edge of Cloudflare’s ever-expanding global network — bringing the power and flexibility of a cloud data center, and the redundancy of a massively distributed system, within milliseconds of virtually every Internet user.
Developers can now build applications, that are increasingly complex and dynamic to meet the demands of consumers who want richer environments with greater personalization and flexibility. Customers can now maximize their existing investments to:
- Reduce dependencies on their origin infrastructure
- Improve cache hit rate
- Streamline how applications communicate with an increasing number of APIs
- Deliver a better user experience for users on any device or network
- Mitigate the impact of malicious bots on their infrastructure
Infrastructure Lead at Postmates
Run code at the edge, not at the origin
Cloudflare Workers lets developers deploy JavaScript code at Cloudflare's edge, closer to the end user. Based on the Service Workers API, developers now have the ability to securely run code that is no longer bound to the browser on a user's device. Workers enable programmatic functionality for routing, filtering and responding to HTTP requests that would otherwise need to be run on a customer's server at the origin. Workers can be rapidly propagated across Cloudflare's global infrastructure within seconds.
Deliver personalized user experiences
Cache lightweight static HTML pages at the edge while incorporating dynamic content based on user location, device type or time of day. Run multiple background service requests either to the origin or third party Internet domains.
Increase API responsiveness
Aggregate responses from multiple API endpoints, and return as a single response, eliminating the need for each endpoint to compile individual responses. Each request can also be split into multiple parallel requests then combined into a single response.
Detect bot activity
Build conditional responses for inbound requests that can assess and block malicious bots from completing their requests. Set parameters that can identify and authorize legitimate traffic.
addEventListener('fetch', event => {
event.respondWith(fetchAndApply(event.request))
})
async function fetchAndApply(request) {
if (request.headers.get('user-agent').includes('annoying_robot')) {
return new Response('Sorry, this page is not available.',
{ status: 403, statusText: 'Forbidden' })
}
return fetch(request)
}
Simplify A/B testing
Enable randomized page selection by intercepting inbound HTTP requests and serving content requests at the edge to specific control and test groups.
Easily identify users at the edge
Implement IP detection at the edge to determine where your users are connecting from. Enforce granular access policies with custom security rules and filters.
addEventListener('fetch', event => {
event.respondWith(fetchAndApply(event.request))
})
async function fetchAndApply(request) {
if (request.headers.get('cf-connecting-ip') === '225.0.0.1') {
return new Response('Sorry, this page is not available.',
{ status: 403, statusText: 'Forbidden' })
}
return fetch(request)
}
Key Features
V8 JavaScript
Apply custom logic expressions for routing and caching at the edge
Securely sandboxed using V8
Fast startup times at all locations
Return HTTP responses from the edge
Deployed to Cloudflare's data centers within seconds
Pre-scripted deployment recipes
Based on the W3C standard Service Workers API
Senior System Administrator at MaxMind
Everyone can start using Cloudflare Workers
Cloudflare protects and accelerates Internet applications and APIs. To start using Cloudflare Workers, you'll need a Cloudflare plan and an active Workers subscription.
Activate Today Already a customer?
Workers for Cloudflare's Free Plan
+ $5/Month
First 10M requests free;
$.50 per million thereafter
< 5ms CPU Processor Time
1 Script Included
Workers for Cloudflare's Pro Plan
+ $5/Month
First 10M requests free;
$.50 per million thereafter
< 10ms CPU Processor Time
1 Script Included
Workers for Cloudflare's Business Plan
+ $5/Month
First 10M requests free;
$.50 per million thereafter
< 50ms CPU Processor Time
1 Script Included
Workers for Cloudflare's Enterprise Plan
Custom
Custom Pricing
Negotiable CPU Processor Time
Unlimited Scripts Included