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Durable Objects

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Cloudflare Durable Objects

Overview
Getting started

What are Durable Objects?
Lifecycle of a Durable Object

Rules of Durable Objects
Invoke methods
Access Durable Objects Storage
Use WebSockets
Error handling

Durable Object Base Class
Durable Object Namespace
Durable Object ID
Durable Object Stub
Durable Object State
SQLite-backed Durable Object Storage
KV-backed Durable Object Storage (Legacy)
Durable Object Container API(opens in a new tab)
Alarms
WebGPU
Rust API(opens in a new tab)

Cloudflare Durable Objects

REST API(opens in a new tab)

Troubleshooting
Metrics and analytics
Data Studio

Build a counter
Build a WebSocket server
Build a WebSocket server with WebSocket Hibernation
Durable Object in-memory state
Testing Durable Objects
Use ReadableStream with Durable Object and Workers
Use RpcTarget class to handle Durable Object metadata
Use the Alarms API
Durable Object Time To Live
Use Workers KV from Durable Objects
Agents(opens in a new tab)

Cloudflare Durable Objects

Tutorials
Demos and architectures
Videos

Pricing
Limits
Choose a data or storage product(opens in a new tab)
Known issues

In-memory state in a Durable Object
Durable Object class exports
Data security
Data location
Environments
Gradual Deployments(opens in a new tab)
FAQs
Glossary
Durable Object class migrations (legacy)

Cloudflare Durable Objects

Release notes

Videos

Introduction to Durable Objects

Dive into a hands-on Durable Objects project and learn how to build stateful apps using serverless architecture

Adapted from developers.cloudflare.com/durable-objects/video-tutorials by Cloudflare, Inc., licensed under CC BY 4.0. Changes were made: this page is re-rendered from the original's source.

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Translation © 2026 fanyi.dev · Original © 2026 Cloudflare, Inc. (CC BY 4.0)

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