AI Code Explainer
Explain, debug, refactor or write tests for any code snippet with AI.
Free AI Code Explainer & Reviewer
Paste any code snippet and let AI explain it, find bugs, suggest improvements, add comments, refactor, or write unit tests. Works with JavaScript, TypeScript, Python, Go, Java, C#, Rust, SQL and more — the AI auto-detects the language.
How to use this tool
- 1
Paste your code
Any language — the AI detects it automatically.
- 2
Pick an action
Explain, suggest improvements, find bugs, add comments, refactor, or write tests.
- 3
Read the response
Get a clean Markdown breakdown with code blocks you can copy.
Pro tips
- For long files, paste the most relevant function instead of dumping everything.
- Use 'Find bugs' as a sanity check before code review — not as a substitute for one.
- Refactored code should always be re-tested. The AI doesn't run your code.
Frequently asked questions
What languages are supported?
Effectively all mainstream languages: JavaScript, TypeScript, Python, Go, Java, C#, C++, Rust, PHP, Ruby, SQL, Bash, and more.
Is my code saved or shared?
No — code is sent for processing and never stored or used for training.
Will it write production-ready code?
Treat all AI output as a starting point. Always review, test, and verify against your project's standards.