Notepad.exe

A native macOS editor lets you open a Swift, Python, or JavaScript file and run it instantly with a single shortcut, eliminating project wizards, configuration files, and indexing delays. It provides sensible defaults for quick execution while allowing deeper customization such as custom interpreters, build flags, and target selection when needed.

The tool includes an on‑device AI coding assistant that offers completions, refactors, and explanations without sending code to external servers, preserving privacy. It also integrates a SwiftUI preview in the iOS Simulator, Swift Package Manager editing, and a Linux subsystem for running executables on macOS or Linux.

Designed for developers who prefer minimal setup, the editor combines core IDE features—syntax highlighting, debugging, and script organization—into a lightweight, fast‑launching application that runs on macOS 15 and later.