About
Make it easy to create your apps with a lightning-fast code editor. Write, run, and quickly debug code in one app with native support for over 25 languages. Improve your work with 230 syntax markers, essential IDE features, a documentation sidebar, customizable settings, and dark/light styling. CodeRunner is a complete alternative to any text editor, and, among other things, is highly appreciated by developers for its concise interface and a whole range of attractive features.
Write more intelligently
Get your code up and running faster than ever. CodeRunner takes code completion, automatic indentation, and parenthesis sequencing to the next level. Its smart autocomplete feature not only completes a line, but also provides templates for writing an entire function. Quickly switch between tabs, drag them into the order you want, or hide them when you don't need them.
Decorate your code
Brush up on your mistakes with over 230 syntax markers - all updated to the latest language specifications and with customizable colors. Select a word or symbol, and with just one click of a hotkey, you can view and edit the local color range. Watch as the working line is highlighted and even spaces are organized in it. Switch between dark and light themes, or choose a custom theme to create the look you want.
Adjust every setting
Customize CodeRunner to work the way you need. Don't like auto-close parentheses, indent new lines, or syntax highlighting? Just turn them off in the settings editor. Is autocomplete standing in the way of your custom functionality? Disable it temporarily while you work. You can even turn off autosave during your experiments. Let CodeRunner work for you.
Debug like clockwork
Produce consistently high-quality code with helpful debugging tools. For quick debugging, use the built-in web inspector or add your own JavaScript and CSS with simple operating modes. Switch PHP output between terminal and web mode for easy comparison. Set breakpoints, explore the call stack, view and edit variables, and navigate your code in an instant.
Instant document search
Access online documentation for any programming language without leaving the application. CodeRunner's new information sidebar allows you to view functions, methods, classes, and other symbols on the spot. You can even add your own documents as a search source, meaning you can spend less time switching apps and more time writing great code.
Use any language
CodeRunner speaks your language so you can dive into your work without any interruptions. Choose from over 25 supported languages, including 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, and TypeScript. You can even add your own languages with a simple command in the terminal.