marked

Install command: 
brew install --cask marked

Name: Marked

Previewer for Markdown, MultiMarkdown and other text markup languages

https://marked2app.com/

Cask JSON API: /api/cask/marked.json

Cask code: marked.rb on GitHub

Current version: 2.6.46,1071

Current version requires: macOS >= 10.13

Analytics:

Installs (30 days)
marked 38
Installs (90 days)
marked 165
Installs (365 days)
marked 517
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