PreviewText provides QuickLook file previews and file icon thumbnails for textual documents that lack the standard .txt file extension. It also covers other textual files that use other extensions, including .log, .1st, .asc, .nfo, .srt and .sub.
The app provides two app extensions: Text Previewer and Text Thumbnailer, which can be viewed and managed in macOS’ System Preferences > Extensions. The app itself is simply a container for these extensions.
