# Wrangler Cloudflare CLI: Manage Workers from Terminal

# Wrangler: Cloudflare Workers CLI Tool

## Overview
**Wrangler** is the official command-line interface (CLI) for managing Cloudflare Workers directly from your terminal. It provides a comprehensive toolkit for developing, testing, and deploying serverless functions to Cloudflare's global network.

## Key Features

### Development & Local Testing
- **Local development server** - Test Workers locally before deployment
- **Hot reloading** - Automatic refresh on code changes
- **Debugging** - Built-in debugging capabilities
- **TypeScript support** - Native TypeScript compilation

### Project Management
- **Project initialization** - Scaffold new Worker projects
- **Configuration management** - Handle `wrangler.toml` settings
- **Dependency management** - Manage npm packages
- **Environment variables** - Secure secret management

### Deployment & Publishing
- **One-command deployment** - Deploy to Cloudflare's network
- **Versioning** - Manage multiple versions
- **Rollback support** - Revert to previous deployments
- **Staging environments** - Test before production

### Advanced Features
- **KV namespace management** - Interact with Cloudflare KV storage
- **Durable Objects** - Manage stateful serverless compute
- **R2 bucket operations** - Manage object storage
- **D1 database** - Manage serverless SQL databases
- **Analytics Engine** - Access performance metrics

## Common Commands

```bash
# Initialize a new project
wrangler init my-worker

# Start local development server
wrangler dev

# Deploy to production
wrangler deploy

# Manage KV namespaces
wrangler kv:namespace create "my-namespace"
wrangler kv:key put --namespace-id=<id> key value

# Manage secrets
wrangler secret put API_KEY

# View logs
wrangler tail

# Generate types
wrangler types
```

## Installation

```bash
npm install -g wrangler
# or
npm install --save-dev wrangler
```

## Use Cases
- API backends and microservices
- Edge computing and CDN logic
- Serverless functions
- Real-time data processing
- Authentication and authorization layers

Wrangler streamlines the entire Cloudflare Workers development lifecycle from local development to global deployment.