Glance is a fully free native macOS Quick Look extension for Markdown files. Press Space on any .md file in Finder and get an instant, cleanly rendered preview instead of raw syntax. Built for developers working with README files, CLAUDE.md, AGENTS.md, specs, notes, and AI-generated docs. Supports tables, code blocks, links, images, LaTeX math, Mermaid diagrams, and smart zoom. Works fully offline, weighs only 8.3 MB, and has zero telemetry.