Cloudflare Workers™ - Replace Varnish (VCL) with Flexible JavaScript
Run code at the edge, deliver powerful web extensibility
Deliver personalized user experiences
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.
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.
Get Workers now
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Key Features
- High-performance V8 JavaScript Engine
- Securely sandboxed
- Fast startup times at all locations
- Fast key-value storage with Cloudflare Workers KV
- Custom logic expressions for routing and caching at the edge
- Based on the web standard Service Workers API
- Prescripted deployment recipes
- Deployed across Cloudflare's %DataCenterCount%-city network within minutes
- Workers WebAssembly Support
What our customers are saying
"With Workers we’ve been able to push routing and caching to the edge, allowing us to scale further while improving npm's performance for millions of developers. Migrating away from VCL means we can spend more time in JavaScript, which we love."
-Laurie Voss
Co-founder and Chief Data Officer at npm
What our customers are saying
"Cloudflare Workers saves us a great deal of time. Managing bot traffic without Workers would consume valuable development and server resources that are better spent elsewhere."
-John Thompson
Senior System Administrator at MaxMind
Trusted by millions of internet properties
