Cloudflare Developer Docs

Cloudflare Docs

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Explore guides and tutorials to start building on Cloudflare's platform

Powerful primitives, seamlessly integrated

Select your preferred CLI

Changes examples on this page to use the selected CLI.

Deploy with one command

Build and deploy serverless functions and full-stack apps on Cloudflare's global network. No servers to manage. No cold starts or region complexity.

npm create cloudflare@latest my-app

Build with your favorite AI agent

Paste into any AI coding agent to install Cloudflare agent tooling:

What's new

The latest features and improvements shipping across Cloudflare.

View Changelog

Cloudflare Computer now helps agents recover from interruptions and wait for approval

Code that agents run with @cloudflare/computer now survives deploys and crashes, and can pause for approvals or other external checks.

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DNS

Advanced Nameservers use a nameserver type

DNS settings now use the Advanced Nameservers type instead of the Foundation DNS setting.

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Workers

Workers tracing — new spanContext(), setStatus(), and updateName() APIs

Read the trace and span IDs of a span, mark spans as failed or successful, and rename spans after they start.

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WAF

WAF Release - 2026-10-25 - Emergency - Cloudflare Managed Ruleset

Cloudflare Managed Ruleset emergency release introducing rules for Brotli-encoded request bodies and the Next.js image optimization endpoint

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D1

D1 database undelete requests limited to the last 7 days

The D1 undelete API now only restores databases that were deleted within the last 7 days.

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Flagship

Target Flagship feature flags with structured evaluation context

Use nested objects, arrays, and null in Flagship evaluation context, with dot-path targeting and array membership operators.

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Radar

Redesigned Cloudflare Radar homepage

The Cloudflare Radar homepage now features an interactive map of traffic and outages, a curated insights section with tabbed navigation, and an updated interface built with Kumo components.

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Workers

Workers Builds and Pages build images reject compromised eMudhra certificates

The Workers Builds and Pages build images now reject certificates from the compromised eMudhra intermediate CAs. Most projects need no changes.

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Security that scales

Everything you need to secure applications, APIs, and infrastructure.

Public websites & apps

Corporate and home networks

Faster web performance

Accelerate websites and applications with Cloudflare CDN caching, image optimization, smart routing, load balancing, and web analytics.

Explore Directory

DNS

Fast, reliable and resilient DNS queries

World's fastest authoritative DNS, consistently ranked #1 by DNSPerf; free, fully API-managed, DNSSEC supported.

Set up Authoritative DNS

Smart Shield

Minimize origin load and accelerate dynamic content

Intelligently manage traffic, optimize content delivery, and safeguard origin infrastructure.

Enable Smart Shield

CDN

Default caching for static assets, with cache rules for full control

Caches content in 330+ cities worldwide, with instant purging and granular Cache Rules.

Set up Cache Rules

Speed

Assess your site speed and apply recommended optimizations

Application delivery optimizations including minification, Brotli compression, Early Hints, and HTTP/3.

Improve your site speed

Images

Transform, optimize, and deliver images worldwide

Cloudflare Images handles format conversion, responsive sizing, and intelligent caching.

Optimize image delivery

Web Analytics

Understand the performance of your web pages

Cloudflare Web Analytics collects Core Web Vitals and performance data from 100% of page views without cookies or sampling.

Track real user metrics