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Issue Description
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Free AI code refactoring tool to restructure and improve code design. Apply SOLID principles, design patterns, and clean code practices for Python, JavaScript, Java, PHP, C++, and 100+ programming languages instantly!
Paste code in both editors to see differences
Swapcode's AI refactoring tool restructures code across 100+ languages while preserving functionality. Paste your code, select the language, and click "Refactor Code". The AI identifies refactoring opportunities (complex functions, code duplication, poor separation), then applies SOLID principles, extracts methods/classes, implements design patterns (Strategy, Factory), simplifies conditionals, removes duplication, improves naming, and enhances code organization—delivering cleaner, more maintainable code.
🏗️ Design:
SOLID principles & design patterns
♻️ DRY:
Remove duplication, extract methods
✨ Clean:
Simplified logic, better organization
Our AI analyzes your code structure and applies proven refactoring techniques to improve design and quality.
Paste your code that needs refactoring. Works with complex functions, classes, or entire modules.
AI identifies refactoring opportunities and applies design patterns, SOLID principles, and clean code practices.
Receive well-structured code with improved design, better separation of concerns, and enhanced maintainability.
Proven refactoring methods for better code design
Break down large functions into smaller, focused methods with clear responsibilities.
Improve separation of concerns by extracting cohesive functionality into dedicated classes.
Improve code clarity with better variable, function, and class naming conventions.
Reduce complexity by simplifying nested conditionals and complex boolean logic.
Apply DRY principle by identifying and eliminating duplicated code across functions.
Apply appropriate design patterns like Strategy, Factory, Observer, and Decorator.
Each class/function should have one clear purpose and reason to change.
Open for extension but closed for modification through abstraction.
Subtypes must be substitutable for their base types without breaking functionality.
Clients shouldn't depend on interfaces they don't use; prefer specific interfaces.
Depend on abstractions, not concretions; high-level modules independent of low-level.
Don't Repeat Yourself and Keep It Simple, Stupid for maintainable code.
Refactor code in any major programming language
And 100+ more languages with language-specific refactoring patterns
Code refactoring is the process of restructuring existing code without changing its external behavior. It improves code design, readability, maintainability, and quality by applying better patterns, simplifying complex logic, reducing duplication, and following clean code principles like SOLID and DRY.
Our AI analyzes your code structure, identifies refactoring opportunities like complex functions, duplicated code, poor naming, and tight coupling. It then restructures the code by extracting methods, applying design patterns, improving separation of concerns, simplifying logic, and enhancing code organization while preserving functionality.
The tool performs multiple refactoring types: Extract Method (breaking down large functions), Extract Class (improving separation), Rename Variables/Functions (better clarity), Simplify Conditionals (reducing complexity), Remove Duplication (DRY principle), Apply Design Patterns (Strategy, Factory, etc.), Improve Error Handling, and Optimize Data Structures.
Yes! We offer free code refactoring with limited daily usage. Free users get 3 refactorings per day. For unlimited access, faster processing, and priority support, check out our Pro plans.
We support 100+ programming languages including Python, JavaScript, TypeScript, Java, C++, C#, PHP, Ruby, Go, Rust, Swift, Kotlin, and more. The refactoring applies language-specific patterns, idioms, and best practices.
No! Proper refactoring preserves your code's external behavior and functionality. The tool only changes the internal structure, design, and organization. However, always test refactored code thoroughly to ensure it works correctly in your specific environment and with your dependencies.
Start improving your code design with AI-powered refactoring