---
name: "Marked QL"
subtitle: "Real Markdown previews — Mermaid, math, syntax highlighting — from the Finder spacebar"
date: 2026-07-12
shortlist: true
promotedTo: marked-ql-finder-preview
link: "https://markedapp.com/ql/"
linkText: "markedapp.com"
source: "Brett Terpstra"
topics: [apple-tips, macos-apps]
tags: [markdown, quick-look, finder, mac-utility]
description: "A $4.99 Quick Look extension that renders full Markdown (Mermaid diagrams, inline math, syntax highlighting) with a spacebar press in Finder, no app to open."
---

Marked QL is a $4.99 Quick Look extension that renders real Markdown previews — complete with Mermaid diagrams, inline math, and syntax-highlighted code — with just a spacebar press in Finder. No app has to open, and it works from Terminal too, since `qlmanage -p` calls the same preview.