Cloudflare Experiments

Build at the edge. For real.

60+ deployable experiments across the Cloudflare platform - not Hello World demos.

Read the docs Quick start View on GitHub

60+

Experiments

Reference implementations, not toy examples

Most Cloudflare tutorials stop at Hello World. This repo shows what you can actually build - one focused experiment per product capability, with tests, docs, and a deploy button.

Edge-first

Every experiment runs on Cloudflare Workers at the edge - low latency, global reach, no servers to manage.

Single responsibility

One experiment, one capability. Copy a focused reference instead of untangling a monolith.

Independently deployable

Each folder is self-contained with its own wrangler.json, tests, and one-click Deploy button.

Under 60 seconds

Request paths are designed to complete quickly - ideal for learning, demos, and prototyping.

Read the full philosophy

Workflow

From clone to deployed Worker in four steps

Every experiment follows the same Turborepo layout. Pick one, run it locally, deploy independently, then adapt the pattern.

Pick an experiment

Browse by category - AI, scraping, monitoring, storage - or search docs by binding name like d1 or r2.

Run locally

Clone the monorepo, npm install, and npm run dev -- --filter=<name>. Wrangler serves on port 8787.

Deploy to Workers

Use the Deploy button in each README or wrangler deploy. Configure bindings in the Cloudflare dashboard.

Adapt the pattern

Fork the code into your project. Each experiment is MIT licensed - use it as a starting point, not a dependency.

Terminal

git clone https://github.com/shrinathsnayak/cloudflare-experiments.git
cd cloudflare-experiments
npm install
npm run dev -- --filter=ai-website-summary
curl "http://localhost:8787/summary?url=https://example.com"

Popular

Featured experiments

A starting point if you are not sure where to begin - each links to full API docs and a Deploy button.

AI Website SummarySummarize any webpage with Workers AI Screenshot APICapture PNG screenshots via Browser Rendering Social Preview InspectorValidate Twitter, Open Graph, and Google snippets D1 SQL PlaygroundRead-only SQL over a seeded edge database RAG Mini SearchVectorize retrieval + Workers AI grounded Q&A Uptime Monitor AlertsCron checks, D1 history, email on downtime Webhook Relay InspectorCapture inbound webhooks in a Durable Object session DNS Propagation CheckerCompare Cloudflare, Google, and Quad9 resolver answers

Platform

Cloudflare capabilities in practice

Every experiment maps to a specific product or binding. Use these as copy-paste references when wiring up your own Workers.

Workers AI & Gateway

Summarization, translation, embeddings, image generation, speech-to-text, and AI Gateway caching.

Browser Rendering

Headless Chrome at the edge for screenshots, PDFs, metrics, and JS-rendered content extraction.

HTMLRewriter

Parse and transform HTML without a browser - metadata, stats, social tags, and rewrites.

Edge networking

DNS lookup, propagation checks, uptime monitoring, CORS testing, TLS inspection, and geolocation.

D1, KV & Vectorize

Edge SQL, key-value storage, semantic search, mock APIs, and short links with cache layers.

R2 object storage

Private and public buckets, presigned uploads, and snapshot storage for change tracking.

Durable Objects

Strongly consistent state, WebSockets, alarms, and webhook capture sessions at the edge.

Cron & Queues

Scheduled handlers, background job processing, retries, and pipeline orchestration.

Bindings

Search docs by binding

Use the docs search bar with tags like ai, browser, d1, r2, or do to filter experiments by Cloudflare binding.

AIBROWSERD1KVR2DOQUEUEVECTORIZECRONCACHEEMAILWORKFLOWANALYTICSRATE_LIMITER

Cloudflare features reference

Structure

Consistent experiment layout

Every Worker under apps/experiments/ uses the same folder conventions - routes, lib, types, tests, and wrangler.json.

apps/experiments/<name>/Standalone Worker package
src/routes/Hono route handlers
src/lib/Domain logic
test/Vitest smoke + unit tests
wrangler.jsonBindings and config

Catalog

All experiments by category

Browse the full catalog - 60+ deployable Workers organized the same way as the documentation sidebar.

AI & Machine Learning

Workers AI, embeddings, RAG, image generation, and AI Gateway patterns.

12 experiments

AI Website SummarySummarize webpages with Workers AI AI Website Tag GeneratorGenerate topic tags for any site GitHub Repo ExplainerAI explanation of GitHub repos AI Bot VisibilityCheck AI crawler access in robots.txt Cloud AI ProxyCall any Workers AI model from one endpoint Text TranslatorTranslate text at the edge Sentiment AnalyzerPositive/negative sentiment analysis Text SimilaritySemantic similarity with embeddings AI Image GeneratorText-to-image with FLUX models Speech to TextTranscribe audio with Whisper RAG Mini SearchVectorize + Workers AI Q&A AI Gateway DashboardGateway cache and latency metadata

Web Scraping & Parsing

Fetch, HTMLRewriter, metadata extraction, and structured page APIs.

8 experiments

Metadata ExtractorTitle, OG tags, canonical URL Website to APIStructured JSON from any page Website to llms.txtLLM-friendly page export DevTools InspectorHeaders, scripts, assets, cookies Dependency AnalyzerScripts, styles, fonts, images HTML RewriterStats and in-place HTML transforms Social Preview InspectorTwitter, OG, Google previews Readability ExtractorClean article body extraction

Browser Rendering

Fully rendered DOM via Puppeteer at the edge.

5 experiments

Screenshot APIPNG captures of any URL PDF APIGenerate PDFs from webpages Page MetricsLoad timing and heap stats Rendered TextJS-rendered visible text Browser LinksLinks from rendered pages

Network & Monitoring

Reachability, DNS, TLS, latency, change tracking, and CORS debugging.

11 experiments

Is It DownEdge reachability checks URL DNS LookupA, AAAA, MX, TXT, and more DNS Propagation CheckerMulti-resolver comparison Redirect SimulatorTrace redirect chains Where Am Irequest.cf geolocation metadata Response HeadersInspect response headers SSL Certificate InspectorTLS cert metadata Multi-PoP Latency MapLatency and serving colo Website Change TrackerR2 snapshots + D1 diffs Uptime Monitor AlertsCron pings + email alerts CORS Preflight TesterSimulate OPTIONS preflight

Edge Platform

Web Crypto, caching, WebSockets, auth helpers, and platform APIs.

8 experiments

Edge CacheWorkers Cache API HIT/MISS Crypto HashSHA-256/384/512 digests WebSocket EchoWebSocketPair echo server Image Resizercf.image resizing Turnstile VerifyBot challenge verification JWT InspectorDecode, verify, issue JWTs Rate Limiter DemoNative rate limiting binding Webhook Signature VerifierHMAC timing-safe verify

Storage & Data

R2, D1, KV, Vectorize, and mock API patterns.

7 experiments

R2 StorageList, get, put, delete objects Link ShortenerD1 primary + KV cache D1 SQL PlaygroundRead-only SQL playground KV NotesSimple note storage Vectorize SearchSemantic vector search Presigned R2 UploadBrowser-direct uploads API Mock ServerKV-backed mock endpoints

Stateful & Async

Durable Objects, Cron, Queues, Workflows, and Analytics Engine.

9 experiments

Durable CounterGlobally consistent counter Cron HeartbeatScheduled tasks + KV metadata Task QueueQueues producer/consumer Analytics EngineCustom analytics events Workflows PipelineFetch → AI → R2 pipeline Live Cursor TrackerShared cursors over WebSocket Queue Job VisualizerJob status and retries DO Alarm SchedulerOne-off DO reminders Webhook Relay InspectorInbound webhook capture

Documentation

Learn how the monorepo works

Guides for getting started, contributing new experiments, and understanding deployment patterns.

Overview and category index

Contributing

Add your own experiment

Deployment guide

Bindings, secrets, and deploy buttons

Get started

Jump in with the path that fits your goal.

Ready to build at the edge?

Pick an experiment, deploy it in minutes, and use the source as a reference for your next Cloudflare Worker. All experiments are MIT licensed.

Start with Quick Start Browse experiments

Build at the edge. For real.

Reference implementations, not toy examples

Edge-first

Single responsibility

Independently deployable

Under 60 seconds

From clone to deployed Worker in four steps

Pick an experiment

Run locally

Deploy to Workers

Adapt the pattern

Featured experiments

Cloudflare capabilities in practice

Workers AI & Gateway

Browser Rendering

HTMLRewriter

Edge networking

D1, KV & Vectorize

R2 object storage

Durable Objects

Cron & Queues

Search docs by binding

Consistent experiment layout

All experiments by category

AI & Machine Learning

Web Scraping & Parsing

Browser Rendering

Network & Monitoring

Edge Platform

Storage & Data

Stateful & Async

Learn how the monorepo works

Quick Start

Philosophy

Adding Experiments

Code Standards

Deployment

Architecture

Get started

Introduction

Quick Start

Browse experiments

Philosophy

Contributing

Cloudflare features

Ready to build at the edge?