CodeRunner 4

CodeRunner 4

By Nikolai Krill

  • Category: Developer Tools
  • Release Date: 2015-11-10
  • Current Version: 4.0.3
  • Adult Rating: 4+
  • File Size: 82.95 MB
  • Developer: Nikolai Krill
  • Compatibility: Requires iOS 10.12 or later.


Whether you're new to coding or an experienced developer, CodeRunner is the perfect tool to write, run, and debug code quickly in any programming language. Enjoy essential IDE features such as code completion, integrated debugger, live errors, and documentation sidebar, all in a lightweight and easy-to-use app designed exclusively for macOS. Run Your Code Instantly • CodeRunner was built on the principle that you should be able to run your code instantly, in any language. CodeRunner can run code in 25 languages out-of-the-box, and can easily be extended to support other languages. IDE-Level Code Completion • Any programmer knows the importance of good code completion. CodeRunner's code completion is the best you'll find in any IDE for most languages, and supports completions beyond single words, extra-fuzzy search, documentation snippets, tab-selectable placeholders, and smart ranking of results. Debugging with Breakpoints • Don't clutter your code with print-statements for debugging. Instead, use CodeRunner's built-in debugging features to set breakpoints and step through your code. Just click the text margin to set a breakpoint and start debugging. Explore the call stack, view and edit variables, and interact with the debugger. Debugging code in any language has never been so quick and easy. Live Errors and Linting • Get instant feedback on your code as you write it. CodeRunner checks your document for syntax errors and common issues, displaying errors directly inline with your code. Compile and runtime issues from the console are also intelligently highlighted and included in the document. First-Class Text Editor • At the heart of CodeRunner lies a lightning-fast editor that is packed with useful coding features. Multiple selections save you time by eliminating repetitive edits. Auto-Indent not only perfectly indents existing blocks of code, but is deeply integrated into the editor and indents your code as you type. Best-in-class syntax highlighting is augmented with code tokenizers for local symbols and variables, allowing for unparalleled highlighting and variable renaming features. File Browser and Documentation Sidebar • CodeRunner's modern, single-window interface helps you keep your workspace organized. Use the built-in file browser when working on projects with lots of different files. Use the documentation sidebar to quickly check the online docs for classes and functions without ever leaving the app. Supported Languages for Running Code • AppleScript, C, C++, C#, Go, Haskell, HTML/CSS, Java, JavaScript, Kotlin, LaTeX, Lua, Markdown, Node.js, Objective-C/C++, Perl, PHP, Python, Ruby, Rust, Shell Script, Swift, TypeScript, and user-added languages. For a full list of supported languages and features, please visit



  • Still has space to improve

    By StarkUnix
    Suggest to make C 11 automatically match rather than using C 98 on mac. Refer to Xcode
  • Best *secret*App for students and developers.

    By jgrig2
    This app fits a special niche need in the developement comunity. It is perfect for students, but useful for professionals. It allows you to simply choose a language and run code. That's it. It's not designed to handle large projects, though it can. But that's not its purpose. It's an out-of-the-box app that allows you to code and see the results of your input in C, Java, html, css, php, python, haskell, swift, go, c# etc. It's automatic with the coolest/best features of a sublime text, vs code, or notebook . It is the best way to test code, learn to code, etc. it's a supplement to vs code or sublime not a replacement.
  • Doesn't open on Big Sur

    By EJstan18
    I can't open it.
  • Love it!

    By csmithstack
    ... I really do.
  • flawless

    By Beastie Bejing
    I found this program perfect for my college Java course.
  • Support is weak

    By George Norris
    Couldn't get it work with Typescript. Sent them a message, and tweeted them. No response.
  • Great lightweight IDE

    By Martin Weiss 12
    Great little IDE!! Coming from Eclipse for Java, which I hated, this is a great upgrade. I'm a college student and I program Python in my free time and this IDE is wonderful! To get all the languauges in here for onlt $15 is a great deal/ The only problem I had was sovled quckly by submiting a form on the webside and Nikolai got back to me that day. Would recommend to anyone at any experience level of progaming.
  • Extraordinary editor

    By JoeGuru
    Very well done and likely the best code editor on the app store. You can code in a number of languages and run them natively from the editor. This makes it incredibly useful. I use Javascript and Python quite a bit and this makes short work of both. Syntax highlighting works like you would expect. Very well done.
  • Great lightweight editor and tester

    By Doctor Mantis Toboggan
    I mostly use CodeRunner to just quickly check Python code. Absolutely love how nimble it is. The syntax highlighting is great, it launches quickly, and the reference pane is incredibly useful. Hope this keeps getting updated.
  • Great editor

    By Kbasx
    Best IDE on the market