JavaScript to Python Converter

Convert JavaScript to Python instantly. Perfect for migrating Node.js backends to Python, porting browser scripts to server-side Python, or learning Python from JavaScript.

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Migrate JavaScript to Python Backend

Converting JavaScript to Python brings stronger typing options, more readable syntax, and Python's extensive library ecosystem for data processing, ML, and scientific computing. Our AI converter automatically translates JS's prototypal inheritance to Python classes, async/await patterns to asyncio, and Node.js Express routes to Flask or FastAPI endpoints. Whether you're migrating a Node.js API to Python for better ML integration, consolidating tech stacks, or porting utility scripts, the converter produces clean Python code. Perfect for teams moving from JavaScript monorepos to Python microservices, data teams bringing JS logic into Python pipelines, or developers learning Python's approach to problems they've solved in JavaScript. Handles ES6+ features like arrow functions, destructuring, template literals, and modern async patterns.

Conversion Features

Async/Await to Asyncio

Converts JavaScript async/await to Python's asyncio. Async functions become async def, await expressions remain await, Promises convert to Tasks, and .then() chains become sequential awaits. Event loop handling maps to asyncio.run() or asyncio.create_task().

Express to Flask/FastAPI

Transforms Express.js apps to Flask or FastAPI. app.get/post become @app.route or @app.get decorators, middleware converts to before_request or dependencies, req/res objects become request/response from Flask/FastAPI, and routing parameters map directly.

Modern JS Features

Handles ES6+ syntax - arrow functions become lambdas or def functions, destructuring uses Python unpacking, template literals become f-strings, spread operator becomes * unpacking, and optional chaining converts to getattr or dict.get() with defaults.

Module Systems

Converts require() and import to Python imports. CommonJS module.exports becomes Python module-level exports or __all__, ES6 named exports map to function/class definitions, and default exports become module main exports.

Common Conversions

Functions and Arrow Functions

Function declarations become def statements. Arrow functions convert to lambda (if single expression) or regular def functions. Function hoisting doesn't apply in Python - functions must be defined before use.

Objects and Arrays

JavaScript objects become Python dictionaries. Arrays convert to lists. Object methods use dict methods, array methods like map/filter/reduce become list comprehensions or functional tools from itertools/functools.

Callbacks to Async/Functions

Callback patterns convert to async/await or direct function calls. Event emitters become Python's asyncio events or callback registries. setTimeout/setInterval map to asyncio.sleep and while loops.

FAQs

How are JavaScript async functions converted?

JavaScript async/await converts to Python's async/await using asyncio. Promises become asyncio Tasks or Futures, .then() chains become await expressions, and callback patterns convert to async functions.

What happens to Node.js modules?

Node.js require/import statements become Python imports. Express.js routes convert to Flask or FastAPI endpoints, npm packages map to PyPI equivalents, and middleware becomes Flask before_request decorators or FastAPI dependencies.

Can it convert React components?

The converter handles JavaScript logic but not JSX/React components. For frontend code, consider keeping React or migrating to Python frameworks like Django templates or using Python with HTMX for interactivity.

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