Cloudflare Workers KV
Globally distributed key‑value storage for serverless apps
Best for
Serverless edge apps needing ultra‑low read latency key‑value storage
Skip if
Apps requiring strong consistency or complex query capabilities
What is Cloudflare Workers KV?
Cloudflare Workers KV provides a low‑latency, globally replicated key‑value store that integrates seamlessly with Cloudflare Workers. It lets developers store and retrieve data at the edge, reducing round‑trip time and improving performance for web applications. The service offers automatic replication across Cloudflare’s data centers, built‑in versioning, and configurable expiration, making it ideal for caching, feature flags, and user session data without managing traditional databases.
SpecificationsAI-estimated
Key Features of Cloudflare Workers KV
Use Cases for Cloudflare Workers KV
Static Site Asset Cache
Store pre‑rendered HTML, CSS, or JSON for instant edge delivery.
Feature Flag Store
Enable or disable features per user or region without redeploying code.
Session & Token Storage
Persist short‑lived session tokens close to the user for fast authentication.
Configuration Management
Serve environment‑specific config files directly from the edge.
Pros & Cons of Cloudflare Workers KV
Pros
- Ultra‑low read latency globally
- Zero operational overhead – fully managed
- Simple key‑value API works in any language
- Free tier includes generous storage and requests
Cons
- Eventual consistency may delay write propagation
- Limited query capabilities – only key lookups
- Higher costs at large scale compared to self‑hosted solutions
Frequently Asked Questions
How many reads per second can Workers KV handle?
Workers KV is designed for high throughput; typical workloads see millions of reads per second across the network, with no hard per‑second limit.
Is data encrypted at rest?
Yes, all KV data is encrypted at rest using Cloudflare’s internal encryption mechanisms.
Can I delete a namespace?
Yes, you can delete an entire KV namespace via the Cloudflare dashboard or API, which permanently removes all stored keys.
What consistency model does KV use?
KV provides eventual consistency for writes; reads may return stale data for a short period after a write.
Pricing Overview
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