Connect Cloudflare KV to sync across devices

Deploy the Worker below, then paste the URL here. Your data will sync between iPhone and Mac instantly. View setup steps ↓

One-time setup (10 minutes):
1. Go to dash.cloudflare.com → create a free account
2. Go to Workers & Pages → Create → Create Worker
3. Replace the default code with the Worker code below → click Deploy
4. Go to KV → Create namespace → name it JOURNAL_KV
5. Back in your Worker → Settings → Bindings → Add KV binding: variable name KV, namespace = JOURNAL_KV
6. Copy your Worker URL (e.g. https://journal.yourname.workers.dev) and paste below
7. Open this HTML file in a text editor, find CF_WORKER_URL = '' and paste your URL inside the quotes → save → re-open

export default { async fetch(request, env) { const url = new URL(request.url); const headers = { "Access-Control-Allow-Origin": "*", "Access-Control-Allow-Methods": "GET, POST, OPTIONS", "Access-Control-Allow-Headers": "Content-Type", "Content-Type": "application/json" }; if (request.method === "OPTIONS") return new Response(null, { headers }); if (url.pathname === "/get") { const key = url.searchParams.get("key"); const val = await env.KV.get(key); return new Response(val || "null", { headers }); } if (url.pathname === "/set" && request.method === "POST") { const { key, value } = await request.json(); await env.KV.put(key, JSON.stringify(value)); return new Response(JSON.stringify({ ok: true }), { headers }); } return new Response("Not found", { status: 404 }); } };

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