Documentation Index
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Overview
Getting started
Examples
Tutorials
Best practices
- Workers Best Practices
Demos and architectures
- Overview
- Build an Interactive ChatGPT App
Development & testing
Playground
Configuration
- Overview
- Bindings ↗
- Compatibility dates
- Compatibility flags
- Cron Triggers
- Environment variables
- Integrations
  
  Overview
  APIs
  External Services
- Multipart upload metadata
- Page Rules
- Placement Beta
- Preview URLs
- Routes and domains
  
  Overview
  Custom Domains
  Routes
  workers.dev
- Secrets
- Versions & Deployments
  
  Overview
  Gradual deployments
  Version overrides
  Rollbacks
- Workers Sites
  
  Overview
  Start from existing
  Start from scratch
  Start from Worker
  Workers Sites configuration
CI/CD
- Overview
- Builds
  
  Overview
  Configuration
  Automatic pull requests
  
  Git integration
  
  Overview
  GitHub integration
  GitLab integration
  
  Build image
  Build caching
  Build branches
  Build watch paths
  Deploy Hooks
  Advanced setups
  Event subscriptions
  Troubleshooting builds
  Builds API reference
  Limits & pricing
  MCP server ↗ MCP
- External CI/CD
  
  Overview
  GitHub Actions
  GitLab CI/CD
Runtime APIs
- Overview
- Bindings (env)
  
  Overview
  AI ↗
  Analytics Engine ↗
  Assets ↗
  Browser Run ↗
  D1 ↗
  Dispatcher (Workers for Platforms) ↗
  Durable Objects ↗
  Dynamic Worker Loaders
  Environment Variables ↗
  Hyperdrive ↗
  Images ↗
  KV ↗
  Media Transformations ↗
  mTLS
  Queues ↗
  R2 ↗
  Rate Limiting
  Secrets ↗
  Secrets Store ↗ Beta
  
  Service bindings
  
  Overview
  HTTP
  RPC (WorkerEntrypoint)
  
  Stream ↗
  Vectorize ↗
  Version metadata Beta
  Workflows ↗
- Cache
- Console
- Context (ctx)
- Encoding
- EventSource
- Fetch
- Handlers
  
  Overview
  Alarm Handler ↗
  Email Handler ↗
  Fetch Handler
  Queue Handler ↗
  Scheduled Handler
  Tail Handler
- Headers
- HTMLRewriter
- MessageChannel
- Node.js compatibility
  
  Overview
  assert
  AsyncLocalStorage
  Buffer
  crypto
  Diagnostics Channel
  dns
  EventEmitter
  fs
  http
  https
  net
  path
  process
  Streams
  StringDecoder
  test
  timers
  tls
  url
  util
  zlib
- Performance and timers
- Remote-procedure call (RPC)
  
  Overview
  Lifecycle
  Reserved Methods
  Visibility and Security Model
  TypeScript
  Error handling
- Request
- Response
- Scheduler
- Streams
  
  Overview
  ReadableStream
  ReadableStream BYOBReader
  ReadableStream DefaultReader
  TransformStream
  WritableStream
  WritableStream DefaultWriter
- TCP sockets
- Web Crypto
- Web standards
- WebAssembly (Wasm)
  
  Overview
  Wasm in JavaScript
- WebSockets
Static Assets
Framework guides
- Deploy an existing project
- Web applications
  
  React + Vite
  Astro
  React Router (formerly Remix)
  Next.js
  Vue
  RedwoodSDK
  TanStack Start
  Microfrontends
  SvelteKit
  Vike
  
  More guides...
  
  Analog
  Angular
  Docusaurus
  Gatsby
  Hono
  Nuxt
  Qwik
  Solid Beta
  Waku
- Mobile applications
  
  Expo ↗
- APIs
  
  FastAPI ↗
  Hono ↗
- AI & agents
  
  Agents SDK ↗
  LangChain ↗
Databases
- Connect to databases
- Analytics Engine ↗
- Vectorize (vector database) ↗
- Cloudflare D1 ↗
- Hyperdrive ↗
- 3rd Party Integrations
  
  Overview
  Neon
  PlanetScale
  Supabase
  Turso
  Upstash
  Xata
Testing
- Overview
- Vitest integration
  
  Overview
  Write your first test
  Recipes and examples
  Configuration
  Test APIs
  Isolation and concurrency
  Debugging
  Known issues
  
  Migration guides
  
  Migrate from Miniflare 2's test environments
  Migrate from unstable_dev
- Miniflare
  
  Overview
  Get Started
  Writing tests
  
  Core
  
  Compatibility Dates
  Fetch Events
  Modules
  Multiple Workers
  Queues
  Scheduled Events
  Variables and Secrets
  Web Standards
  WebSockets
  
  Developing
  
  Attaching a Debugger
  Live Reload
  
  Migrations
  
  Migrating from Version 2
  
  Storage
  
  Cache
  D1
  Durable Objects
  KV
  R2
- Wrangler's unstable_startWorker()
Observability
- Overview
- Metrics and analytics
- Logs
  
  Overview
  Workers Logs
  Real-time logs
  Tail Workers
  Workers Logpush
- Traces
  
  Overview Beta
  Spans and attributes
  Known limitations
- Query Builder
- Exporting OpenTelemetry Data
  
  Overview
  Export to Honeycomb
  Export to Grafana Cloud
  Export to Axiom
  Export to Sentry
  Export to PostHog
- MCP server ↗ MCP
- DevTools
  
  Overview
  Breakpoints
  Profiling CPU usage
  Profiling Memory
- Errors and exceptions
- Integrations
  
  Sentry ↗
- Source maps and stack traces
Wrangler
- Overview
- Install/Update Wrangler
- API
- Commands
  
  Overview
  Workers
  General commands
  Artifacts
  Browser
  Certificates
  Containers
  D1
  Hyperdrive
  KV
  Pages
  Pipelines
  Queues
  R2
  Secrets Store
  Tunnel
  Vectorize
  VPC
  Workers for Platforms
  Workflows
- Bundling
- Configuration
- Custom builds
- Deprecations
- Environments
- Migrations
  
  Migrate from Wrangler v3 to v4
  Migrate from Wrangler v2 to v3
  
  Migrate from Wrangler v1 to v2
  
  1. Migrate webpack projects
  2. Update to Wrangler v2
  
  Wrangler v1 (legacy)
  
  Overview
  Install / Update
  Authentication
  Commands
  Configuration
  Webpack
- System environment variables
Vite plugin
Languages
- Overview
- JavaScript
  
  Overview
  Examples ↗
- TypeScript
  
  Overview
  Examples ↗
- Python Workers
  
  Overview Beta
  The Basics
  How Python Workers Work
  Foreign Function Interface (FFI)
  Standard Library
  Examples
  
  Packages
  
  Overview
  FastAPI
  Langchain
- Rust
  
  Overview Beta
  Supported crates
Platform
Reference
Glossary
Agent resources

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Overview

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Workers
Wrangler
Migrations
Migrate from Wrangler v1 to v2
Wrangler v1 (legacy)

Wrangler v1 (legacy)

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The following documentation applied to Wrangler v1 usage.

Warning

This page is for Wrangler v1, which has been deprecated. Learn how to update to the latest version of Wrangler.

Install / Update
Authentication
Commands
Configuration
Webpack

Last updated: Jun 4, 2026

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