Cloudflare Developer Platform

15 live use cases · real Workers AI · $0 egress · 330+ cities · collab room designer

One Worker in front of your site. Zero origin changes. Live in 330+ cities.

HÖMSTYLE store STREAMVAULT Try it Yourself

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One Worker. Every capability.

A Cloudflare Worker intercepts every request before it reaches your origin. It can run AI models, cache in R2 or KV, rewrite HTML, detect the visitor's country — all at the edge, with 0ms cold starts (V8 isolates eliminate the VM boot model), in 330+ cities. Your origin receives a completely normal request and never knows any of this happened.

HTTP request

Cloudflare binding

External fetch()

Animated = live data

330+ cities in 125+ countries · 13,000 network peers · ~50ms from 95% of the world · cold start <1ms

See how Workers intercept →

HTMLRewriter · Workers AI · Llama 3.1

AI on any site.
15 minutes.

HTMLRewriter streams through your origin HTML and injects a Llama-powered chat widget — before the browser sees a single byte. No frontend PR. No backend deploy. No new infrastructure.

Your server returns the same response it always has. The Worker does the rest — in the same milliseconds the response was already travelling.

Live demo → Open STREAMVAULT →

Before → After

// Worker code
const res = await fetch(request)
return new HTMLRewriter()
  .on('body', {
    element(el) {
      el.append(chatWidget, {
        html: true
      })
    }
  })
  .transform(res)

Deploy time~15 min

AWS S3 vs Cloudflare R2

Storage $0.023/GB $0.015/GB

Egress $0.09/GB* $0.00

customMetadata Not auditable cached-at · size-bytes · origin-url

URL changes — None

Cloudflare R2 · $0 egress

Kill your egress bill.
Keep your URLs.

AWS charges $0.09/GB (first 10TB tier) to send data to your users. R2 charges $0.00 — permanently, not as a promo. Same URLs, same latency from the nearest Cloudflare PoP, zero DNS changes. *AWS S3 Standard, US-East-1, first 10TB tier (Apr 2026).

Every object gets customMetadata stamped on first cache — timestamp, file size, origin URL — visible in the dashboard and verifiable via response headers.

Run the demo Try it Yourself →

15 live demos.

AI · $0 egress · semantic search · SEO · voice · video · caching · geo pricing · subtitles · collab room designer — none touched the origin.

Workers Routes

origin changes

How Workers Intercept

The foundation of every demo. Deploy a Worker in front of any site — your origin never knows it exists.

One Worker. Every capability.

AI on any site.15 minutes.

Kill your egress bill.Keep your URLs.

15 live demos.

How Workers Intercept

AI Chatbot Injection

R2 Storage — Zero Egress

Semantic Search

AI Sentiment Analysis

Local Currency at the Edge

KV Edge Caching

Auto Subtitles

AI Voice Agent

Image Resizing

Build APIs at the Edge

Video Streaming

AI Review Assistant

SEO — Rich Results at the Edge

Collaborative Room Designer

Ship it on your domain today.

AI on any site.
15 minutes.

Kill your egress bill.
Keep your URLs.