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Notepad.exe

A small Mac code editor between Notepad and Xcode.

Open a blank note, write code, hit Run. Swift, Python, JavaScript, TypeScript, Go, and Rust work out of the box. Anything worth keeping goes into the Library.

Summary

Notepad.exe is for code ideas you can run before you make a project. Open a note, run the file, and keep the result if it is useful. A quick note can later become a Library item, a SwiftUI Simulator experiment, a Linux-tested workflow, or a local Mac app.

Quick facts

  • Product: Notepad.exe.
  • Developer: Marcin Krzyzanowski, independent developer.
  • Platform: macOS 15.6+.
  • Languages: Swift, Python, JavaScript, TypeScript, Go, and Rust.
  • Pricing: Free download; Pro $19.99/year; Perpetual 1.x license $45; student and educator access available.
  • Availability: direct download from notepadexe.com; Homebrew with brew install notepadexe.
  • Review access: press@notepadexe.com.

Origin

Notepad.exe came from a boring problem: opening Xcode or setting up a venv just to try five lines of code. The throwaway files piled up as test2.py, test2final.py, and other names nobody could find a week later.

Notepad.exe starts with the note instead. Open it, type code, hit Run. Useful work can stay in a searchable, taggable Library. If the scratch file grows up, you can add packages, run SwiftUI in Simulator, distribute a macOS Swift note as a local app, run a Linux target in a container the app starts, or ask the built-in assistant to run code, read errors, and make fixes.

What is different

  • No project setup. Start with a note and run the file.
  • Several languages in one place. Swift, Python, JavaScript, TypeScript, Go, and Rust run in the same Mac app.
  • Notes Library. Search, tag, and reopen snippets or projects instead of losing them in throwaway folders.
  • It can grow past the note. Add packages, use iOS Simulator, test Linux workflows, export a Mac app, or ask the assistant to help when the idea needs more.

Coverage angles

  • Scratch work with memory. Start fast, then keep useful snippets in a Library instead of losing them in throwaway files.
  • A smaller path into Apple development. Try Swift and SwiftUI ideas without opening Xcode first.
  • One place for small multi-language work. Run Swift, Python, JavaScript, TypeScript, Go, and Rust from the same Mac app.
  • A coding assistant with a choice of provider. On-Device Model stays on the Mac. Notepad AI, ChatGPT, and Claude send the conversation out. The assistant can run code, read errors, and edit files.

What to try in a review

  1. Create a blank note and run code in under 30 seconds.
  2. Run Swift, Python, JavaScript/TypeScript, Go, or Rust without creating a project first.
  3. Use Notes Library search and tags to find old scratch work.
  4. Run a SwiftUI idea in iOS Simulator.
  5. Ask the assistant to run code, read the errors, and make fixes.
  6. Show a Linux target. Swift and Go cross-compile, then run in a container the app starts. Python, Bun, and Rust run inside it.
  7. Distribute a macOS Swift note as a local Mac app.

Media assets

Current press screenshots are below. Download individual images or the full media kit.

Download media kit ZIP

Notepad.exe editor running TypeScript on macOS
Editor and code execution
Notepad.exe Library with search results and tags
Library search and tags
SwiftUI code and iOS Simulator running inside Notepad.exe
SwiftUI and Simulator workflow
Notepad.exe assistant showing build results beside an iOS Simulator run
Assistant build and run workflow
Notepad.exe running Go code against a Linux target
Linux target workflow
Notepad.exe running SwiftUI code with the resulting Mac app window in front
Local Mac app workflow
Notepad.exe Library, template selector, and editor shown as a new project flow
Library to template to editor flow

You can use these media assets for press and review coverage of Notepad.exe. The ZIP contains screenshots, icon, social image, and a short README.

Boilerplate

Short

Notepad.exe is a small Mac code editor between Notepad and Xcode: note first, project later.

Medium

Notepad.exe is a native macOS code editor for ideas that should run now. It opens on a blank note, runs Swift, Python, JavaScript, TypeScript, Go, and Rust, and keeps useful snippets or projects in a searchable Library.

Long

Notepad.exe is a native macOS code editor for developers who want to try ideas without starting with project setup. It runs Swift, Python, JavaScript, TypeScript, Go, and Rust from a note first workflow. Useful scratch work can grow with packages, iOS Simulator runs, a Linux container, a local Mac app from a Swift note, and an assistant that can run code, read errors, and edit files.

About the developer

Notepad.exe is made by Marcin Krzyzanowski, an independent developer building native Mac tools for fast, direct work.

FAQ

What does "note first, project later" mean?

Notepad.exe starts with a runnable note instead of a project wizard. If the idea grows, you can add dependencies, organize it in the Library, run it in Simulator, test a Linux target, or distribute a macOS Swift note as a local Mac app.

Does every note start blank?

No. You can start from a blank runnable note or use templates for scripts, apps, packages, tests, and advanced workflows. Templates cover common Swift, Python, JavaScript, TypeScript, Go, and Rust starting points, including macOS, iOS, and Linux targets.

Which languages are supported?

Swift, Python, JavaScript, TypeScript, Go, and Rust.

Does the AI require one provider?

No. Settings lists Notepad AI, ChatGPT (API), ChatGPT (Codex), Claude (Anthropic), and On-Device Model. Notepad AI is the default and sends the conversation through Cloudflare. On-Device Model stays on the Mac.

Can it run code on Linux?

Yes. The app starts a Linux container. Swift and Go cross-compile on the Mac and the binary runs in that container. Python, Bun, and Rust run inside it. There is no virtual machine to set up. Rust Linux requires Apple Silicon.

Can it make Mac apps?

Distribute App builds a local Mac app from a macOS Swift note, including SwiftUI and AppKit. The bundle is unsigned and unnotarized. Python, Go, JavaScript, and Rust stay in the editor.

Where can people get it?

Download it from notepadexe.com or install with brew install notepadexe.

Press contact

Marcin Krzyzanowski
press@notepadexe.com · @krzyzanowskim