Looq is a powerful extension tool designed specifically for the native Quick Look feature on Mac systems. It can replace the basic file preview interface opened by pressing the Space bar in Finder, upgrading it into a full-featured viewer that supports dozens of additional file formats, including Markdown documents, code files, SQLite databases, archives, application metadata, and more.

After installing this extension, simply select any file in Finder and press the Space bar. The window that appears is no longer a simple preview pane, but a complete preview interface with content rendering, code syntax highlighting, page navigation, and interactive features, all without launching large applications.

Compared with the system’s built-in Quick Look feature, Looq provides a complete interactive browsing experience for the following file types:

Markdown Files

• Fully compatible with GitHub-flavored Markdown syntax.
• Floating table of contents in the sidebar that follows page scrolling.
• Supports KaTeX mathematical formulas, including inline formulas and standalone formula blocks.
• Equipped with BeautifulMermaid and mermaid.js to render various Mermaid diagrams.
• Supports GitHub-style callouts and emoji shortcodes.
• Refreshes the preview in real time while editing files, with no interface flickering.

Source Code (Supports Over 200 File Types)

• Uses Visual Studio Code syntax rules and theme colors for code highlighting.
• Floating scope title bar, keeping function names, class names, and other headings pinned to the top while scrolling.
• Displays line numbers and highlights the line where the cursor is located.
• Supports script interpreter declaration files and various configuration files.

SQLite Databases

• Open .db database files directly without any additional tools.
• View tables, switch between tables, and browse data by row with pagination.
• Hover the mouse to view field type and constraint hints.
• Uses block-based loading, allowing smooth use even when a table contains millions of rows.

Spreadsheet Files (TSV/CSV)

• Displays TSV files in the system-native AppKit table style.
• Supports column sorting and content pagination.

Diff/Patch Files

• Uses red and green color schemes to clearly show code changes.
• Displays old and new code line numbers in corresponding pairs.
• Displays multi-file diff content in separate tabs.

Archives (No Extraction Required)

• View the internal files of ZIP, TAR, GZ, BZ2, and other archives.
• Presents the file structure using the same display style as Finder.

Folders (Finder-like Style)

• Supports two browsing modes: list view and icon grid view.
• Can sort and group by date, file type, size, and tags.

Application and Installer Package Metadata

• View code signing, permissions, and notarization information for .app, .ipa, .pkg, .dmg, .iso, .torrent, and configuration profiles.
• Displays Info.plist files and other internal data that the native Quick Look feature cannot read.