JS Server

Server turns your iPhone or iPad into a developer-friendly HTTP host. Point a listener at a file and it gets served. Write JavaScript and it runs.

WHAT YOU CAN DO

Serve static files
Pick a file from the Files app, or edit one inline. Custom Content-Type per listener. A default HTML page is provided for quick smoke tests.

Write JavaScript routes
Every JavaScript listener gets an Express-like surface running inside JavaScriptCore. Register routes with server.get, server.post, server.all, and respond with res.html, res.json, res.text, res.send. Set status and headers fluently. No Node dependency. Your code evaluates on device.

Read and write files from JS
A sandboxed fs module is bridged through Swift: readFile, writeFile, exists, mkdir, readdir, unlink, stat. Every listener gets its own private directory. Any path that tries to escape the sandbox is rejected.

Call external APIs
Outbound fetch is bridged too. Pass a URL, optionally a method, headers, or a body, and get back status, ok, headers, text, and json. Perfect for proxies, webhooks, or quick integrations.

Run multiple listeners at once
Each listener runs on its own port, started and stopped independently. Bonjour advertises them on your local network so peers can find them by name.

Live Activities
A listener running in the background shows up in the Dynamic Island and on the Lock Screen with the port and request count.

Inspect every request
The Console panel logs every HTTP request, every console.log, and every runtime error. Tap an HTTP row to expand the full request (method, URL, headers, body) and response (status, headers, body, timing).

Syntax highlighting
In-app editor with an IDE-style dark theme for JavaScript, Python, and HTML.

WHO IT IS FOR

Developers prototyping APIs on the go. QA engineers testing mobile clients against a controllable backend. Anyone who needs to serve a JSON blob, a mock endpoint, or a small HTML page from their iPad without setting up a real server.

PRIVACY

No accounts, no telemetry, no analytics. Nothing leaves the device except the HTTP responses you explicitly send. All code, data, and logs live in your app sandbox.

Questions or feedback: [email protected]