CodeRunner
CodeRunner is a macOS programming editor and lightweight IDE for writing, running, and debugging code in many languages.
What is CodeRunner?
CodeRunner is a native macOS programming editor and lightweight IDE built for writing, running, and debugging code in one app. It is designed for students, hobbyists, and professional developers who want a faster alternative to larger development environments for everyday coding tasks. The app supports running code instantly in many languages, with built-in tools for editing, code completion, debugging, and inline error checking. It also includes practical features such as folder-wide search and replace, a documentation sidebar, a file navigator, and a built-in console. CodeRunner works well for quick scripts, learning new languages, testing code snippets, and general-purpose development on Mac. It is published by Nikolai Krill and focused specifically on developer workflows on macOS.
Key features
- Write and run code instantly in 25 languages out of the box
- Debug programs with breakpoints, variable inspection, and step-through controls
- Use advanced code completion with documentation snippets and fuzzy matching
- See live syntax errors and linting feedback directly in the editor
- Search and replace across entire folders and navigate files quickly
- Work with a built-in console, run arguments, and saved input sets
- Customize key bindings, use Vim mode, and script editor behavior
Review app leftovers with diCleaner
Inspect caches, support files, containers, and login items before cleaning.
Safety overview
Status: Safe
CodeRunner is legitimate developer software for macOS. It works with the code files and project folders you choose to open, and some features may call local compilers, interpreters, debuggers, or linters installed on your Mac as part of normal development work. That behavior is expected for a programming editor, but you should still be careful when running unfamiliar code because the commands and scripts you execute can affect files on your system. Keep the app updated and only run code you trust.
Recommendation: Keep CodeRunner if you use it for coding, scripting, debugging, or learning programming on your Mac. Remove it if you no longer use it, but expect to lose its app settings and any convenience features tied to your local development workflow.
Common paths
/Applications/CodeRunner.app
Cache paths
~/Library/Caches/com.krill.CodeRunner
Support paths
~/Library/Application Support/CodeRunner
Preference paths
~/Library/Preferences/com.krill.CodeRunner.plist
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