You can quick look inside folders and archives with Folder Preview in Finder or any other third-party file management apps. Before started, you will have to enable the Quick Look extension in System Settings. Then you can press spacebar or ⌘ + Y to quick look folders or archive files in Finder or other apps. You can also right-click the column header to show or hide columns. Folder Preview also supports showing thumbnails of images, SVGs, and PDF documents. ## Supported file extensions of archives - zip - tar - gz - 7z - rar