PreviewCode

PreviewCode provides QuickLook file previews and Finder file icon thumbnails for source code documents and data files for a wide variety of programming languages. The app provides two app extensions: Code Previewer and Code Thumbnailer, which can be viewed and managed in macOS’ System Preferences > Extensions. The app itself is a container for these extensions. You must run the app first to gain these benefits. PreviewCode supports the following languages features: • ActionScript • Ada • AppleScript • Arduino • Basic • Brainf**k • C • C++ • C# • Clojure (see Known Issues, below) • CoffeeScript • Dart • Elixir (see Known Issues, below) • Elm • Erlang • Fortran • F# • GML • Go • Haskell • Java • JavaScript • Julia • Kotlin • Lisp • Lua • Objective-C • OPL • Pascal • Perl • PHP • Python • Ruby • Rust • Swift • TypeScript (see Known Issues, below) • Visual Basic Script • Vue.js Shell Scripting • Bash • C Shell • Korn Shell • TCSH • Z Shell Assembly • ARM Assembler • x86-64 Assembler • 6809 Assembler Others • Asciidoc • CMake files • Config • CSS • DxO PhotoLab sidecar files (.dop) • Environment files (.env) • Extensible Metadata Platform files (.xmp) • LaTex • Protobuf • SASS/SCSS • SQL script • Twig • Terraform source and vars files • Translation Memory eXchange files (.tmx) • Xcode files (.storyboard, .xib, .plist, .strings) • XML Localization Interchange File Formaf (.xlf) Known Issues • PreviewCode will not render TypeScript .ts files: the .ts file extension is pre-set on macOS to MPEG-2 transport stream video files. The .tsx and .typescript extensions are supported. • PreviewCode will not render Clojure .edn files: the .edn file extension is pre-set on macOS to an Adobe digital rights management product. • PreviewCode will not render Elixir .exs files if GarageBand and/or Logic Pro is installed on your Mac. This is because these apps use this file extension for EXS24 instrument files. • Previews displayed on external displays, or on Macs with connected to multiple monitors, may intermittently not be scrollable if you’re using a third-party mouse. Workaround: a MacBook’s built-in trackpad will be able to scroll. • Deselecting code in the preview is not immediate: the highlight clears after ~1s. We are investigating fixes.