Build Serverless Applications with Cloudflare Workers KV
Serverless key-value storage for applications on Cloudflare
Cloudflare Workers KV provides access to a secure low latency key-value store at all of Cloudflare's data centers in over 180 cities across 80 countries. Developers can use Cloudflare Workers and Workers KV to augment existing applications or to build entirely new applications on top of Cloudflare's global cloud network. Workers KV scales seamlessly to support applications serving dozens or millions of users.
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Co-founder and Chief Data Officer at npm
Build more with serverless storage
Building serverless applications with fast global response times requires moving compute and storage closer to the user. Cloudflare created a serverless execution environment at all of Cloudflare's data centers in over 180 cities across 80 countries, but customers still faced the time intensive and complex task of managing their own storage. Now with Workers KV, low latency global application access to a scalable key-value store is only an API call away.
Responsive applications anywhere
Serverless applications running on Cloudflare Workers receive low latency access to a globally distributed key-value store. Cloudflare Workers KV achieves this low latency by caching replicas of the keys and values in Cloudflare's global cloud network.
Build without scaling concerns
Cloudflare Workers KV lets developers focus their time on adding new capabilities to their serverless applications instead of wasting time scaling their key-value stores.
Create targeted e-commerce experiences
Using Workers KV to quickly access data, generate customized pages just as quickly as serving static sites. This makes it possible to add shopping cart data to e-commerce sites, target marketing to subsets of visitors, and significantly reduce latency for a whole host of applications.
Enforce custom authorization and authentication
Store session tokens or other user information to quickly ensure the right user has access to the right content. Move the authentication layer out of applications and into the network itself to improve site speed while reducing the threat of application-level authentication vulnerabilities.
Customize application behavior
Store and return custom content based on user, session, cookie, or any other request attribute. Perform low latency injection of personalized content from Workers KV into any cached or uncached template before returning it to the user.
Deploy granular tests
Run A/B tests or stage release rollouts on a per-user basis. Use Cloudflare Workers KV to store millions of tests that can be quickly run from Workers anywhere in the world. Write analytics back to Workers KV or any other analytics services directly from the Worker.
Remember specific bad actors
Stop cheaters, spammers, trolls, and other bad actors by storing IPs, user IDs, or any relevant data in Cloudflare Workers KV. Easily write to and run quick checks against large block lists to prevent bad actors from reaching protected applications that try to post, register, or perform other undesired actions.
Senior Staff Performance Engineer, Optimizely
Included with Workers subscription
1 GB
Key-value storage space
10M
Key-value reads
1M
Key-value writes
Usage based charges
$0.50 GB/month
Additional storage
$0.50 1M
Additional key-value reads
$5 1M
Additional key-value writes
Key Features
Accessible from all 180 Cloudflare locations
Supports values up to 2 MB
Supports keys up to 512 Bytes
Read and write from Cloudflare Workers
API to write to Workers KV from 3rd party applications
Uses Cloudflare’s robust caching infrastructure
Set arbitrary TTLs for values
Integrates with Workers Preview