# Downright press and product facts

Downright Markdown is a free, open-source native Markdown editor and viewer for macOS. It renders local Markdown exactly, reviews external agent rewrites live, and keeps the source file in charge.

## 50-word description

Downright is a free, MIT-licensed native Markdown reader and editor for macOS. Open ordinary files, preview them from Finder with Quick Look, and review external rewrites with word-level changes. It uses AppKit and TextKit 2, keeps the source file in charge, and requires no account, vault, or cloud sync.

## Product film

One Markdown file, from Finder to native reading, exact source, and external-change review.

- [23-second master](/assets/downright-one-journey-master.mp4)
- [15-second social cut](/assets/downright-social-15s.mp4)
- [10-second demo](/assets/downright-readme-10s.mp4)

## 150-word description

Downright Markdown is a native macOS document surface for the Markdown files people and coding agents change together. It opens ordinary project files directly, renders the source without normalizing it into a database, and moves between reading, editing, and Source Focus on the same text surface. Finder and Quick Look make a README or plan easy to inspect; the `down` command makes it easy to hand a generated document back to a human. When Claude Code, Codex, a script, or another process rewrites an open file, Downright treats that as a review event: it preserves the local buffer, shows what changed, and asks whether to keep the local version or take the version on disk. Downright is free, MIT licensed, works on macOS 14+, and does not require an account or network connection for ordinary reading, editing, searching, diffing, and export.

- Platform: macOS 14+
- License: MIT
- Architecture: AppKit and TextKit 2; no WebView
- Integrations: Finder, Quick Look, Spotlight, Services, App Intents, and `down`
- Privacy: no account or telemetry required during ordinary use

## Press assets

- Product film: [/assets/downright-one-journey-master.mp4](/assets/downright-one-journey-master.mp4)
- Social cut: [/assets/downright-social-15s.mp4](/assets/downright-social-15s.mp4)
- README demo: [/assets/downright-readme-10s.mp4](/assets/downright-readme-10s.mp4)
- App icon: [/assets/downright-app-icon.png](/assets/downright-app-icon.png)
- Vector mark: [/favicon.svg](/favicon.svg)
- Native document/review still: [/assets/downright-native-document-review.jpg](/assets/downright-native-document-review.jpg)
- Start-window still: [/assets/downright-native-start-window.jpg](/assets/downright-native-start-window.jpg)
- Renderer showcase: [/assets/downright-renderer-showcase.png](/assets/downright-renderer-showcase.png)
- Press card: [/og/press.svg](/og/press.svg)
- External-write workflow card: [/og/guides-markdown-external-changes.svg](/og/guides-markdown-external-changes.svg)
- Live product surface: [downright.cc](/)
- Demo route: [review external changes](/guides/markdown-external-changes/)