AI Code Converter — Convert Code Between Languages Online (Free, 2026)

Need to convert Python to JavaScript? Or translate Java to Python? Our AI Code Converter does it instantly. Paste your source code, pick the target language, click Convert — and get production-ready code in seconds. No sign-up. No API key. No cost. Supports 11 languages including Python, JavaScript, Java, C++, TypeScript, Go, Rust, C#, PHP, Ruby, and Swift.

How It Works

1. Paste Your Code: Copy code from your editor, GitHub, or Stack Overflow into the left “Source Code” panel.
2. Select Languages: Choose the source language on the left and the target language on the right. Use the swap button to quickly reverse them.
3. Click Convert: Our AI engine analyzes the code structure — variables, functions, loops, classes, imports — and generates equivalent code in the target language.

Supported Language Conversions

Convert between any pair of these 11 programming languages:

• Most Popular: Python ↔ JavaScript, Java ↔ Python, C++ ↔ Python
• Web Stack: JavaScript ↔ TypeScript, PHP ↔ Python, Ruby ↔ Python
• Systems: C++ ↔ Rust, Go ↔ Python, C# ↔ Java
• Mobile: Swift ↔ Java, Swift ↔ TypeScript

That’s 110 possible conversion pairs — all available for free, unlimited use.

What Gets Converted

Our converter handles the most common code patterns across all supported languages:

• Variable Declarations: const/let/var → language-appropriate syntax (:= in Go, val/var in Swift)
• Functions: function/def/func → target function syntax with proper return types
• Loops: for, while, for...of → equivalent loop constructs
• Conditionals: if/else, switch/case, ternary operators
• Classes & Objects: Class definitions, constructors, methods, inheritance
• Print/Output: console.log ↔ print() ↔ System.out.println ↔ fmt.Println
• Comments: // and /* */ ↔ # conversions preserved
• String Operations: Template literals, concatenation, f-strings converted accurately
• Array/List Methods: .map(), .filter(), .forEach() → equivalent constructs

Why Developers Use Our Converter

• Learning New Languages: Know Python but need to write Go? Paste your Python code and see how the same logic looks in Go. Best way to learn syntax fast.
• Porting Projects: Moving a Node.js backend to Python? Convert files one by one and adjust where needed.
• Code Interviews: Practice problems in your strongest language, then convert to the language required by the interviewer.
• Stack Overflow Answers: Found a great solution in Java but your project uses C#? Convert it instantly.
• Documentation: Show code examples in multiple languages for your API docs or tutorials.

Privacy & Security

Your code never leaves your browser. Everything runs client-side in JavaScript:

• No API calls. Zero server requests. Check your Network tab.
• No data logging or code storage of any kind
• API keys, tokens, and secrets stay completely private
• Works offline after first page load
• Safe for enterprise and proprietary codebases

Tips for Best Results

• Paste Complete Functions: The converter works best with complete code blocks rather than fragments.
• Select Correct Source Language: This ensures the parser understands your syntax correctly.
• Review Edge Cases: While the converter handles most patterns, language-specific idioms may need manual adjustment.
• Use the Swap Button: Quickly reverse source and target languages to compare both directions.

Frequently Asked Questions

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