Showdown
Showdown is a Mac presentation app that lets you create slide decks in Markdown with live preview and presenter-friendly speaking tools.
What is Showdown?
Showdown is a native Mac presentation app for creating slide decks with Markdown instead of a traditional slide editor. It is designed for people who want to prepare clear presentations quickly, such as sprint reviews, technical demos, project updates, classroom materials, or experiment summaries. As you write, Showdown previews the resulting slides live so you can edit content and layout in one place. The app supports speaker notes for presenting, built-in themes plus custom themes for visual styling, and export to PDF for sharing or printing. It also includes presentation-focused formatting features such as code block syntax highlighting, image sizing controls, badges, and chart display from annotated tables. Showdown is published by Tinybird Interactive AB and is available only for macOS.
Key features
- Create presentations by writing Markdown
- Preview slides live while you edit
- Present with speaker notes visible only to you
- Choose built-in themes or add custom themes
- Export presentations to PDF
- Format code blocks with syntax highlighting
- Control image sizing inside slides
- Turn annotated tables into bar or line charts
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Safety overview
Status: Mostly safe
Showdown is a standard Mac productivity app for writing and presenting Markdown-based slide decks. Its normal use may involve access to files and folders you choose so it can open images and presentation content, which is expected for this type of app. The publisher states that the app does not collect data, and its privacy page says personal details are not stored or transmitted, with optional anonymous crash reporting if you choose to send it. Keep your presentations and linked media in trusted locations, especially if they include work notes or draft material.
Recommendation: Keep Showdown if you create or present Markdown slide decks on your Mac. Remove it if you no longer use it for presentations; doing so may also remove locally stored settings and any app-specific workflow convenience, but it should not affect documents you saved elsewhere.
Common paths
/Applications/Showdown.app
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