Notepad.exe

Most code editors make you configure before you create. Notepad.exe skips all of that. Open the app, write your code, and run it. There's no interpreter to pick, no build settings to wrestle with — just a blank note and whatever idea you had five seconds ago. Structure's there if you need it; it just doesn't get in the way first.

Write and run Swift, Python, JavaScript, TypeScript, and Go with zero configuration. Want to prototype SwiftUI or UIKit in the iOS Simulator? Launch it straight from a note. Need to cross-compile Swift, Python, or Go to Linux? It happens on your Mac — no VM involved. Notepad.exe handles the runtime so you don't have to think about it.

Every note lives in a searchable, taggable library. Filter by language, tag by project, or pull up any snippet in a second. No more digging through a mess of loose files on your Desktop. Notes can even float above other apps while you work, so your reference code stays visible while you use it.

The built-in AI coding assistant, Doctor Marvin, streams answers as you type. It can run your project, read the output, and edit your files to fix errors — all without switching apps. Sign in with a ChatGPT Plus or Pro subscription to use it right away, bring your own API key, or choose from a range of cloud and local models. It fits whatever setup you already have.

Notepad.exe includes a fast built-in terminal with color themes that follow your editor. It's not an afterthought — it's part of the same environment. Run commands, check output, and stay in flow without opening a separate window.

Need to inspect an unfamiliar file? Notepad.exe opens almost any file as plain text, with syntax highlighting whenever it recognizes the type. It also supports Swift Package Manager: bookmark packages, pick a build target, and manage dependencies. When a project does grow, you can export it as a working macOS app right from the editor.