Generate modern JavaScript code from plain English descriptions. AI creates ES6+ code instantly. Perfect for web development, DOM manipulation, and async operations.
Paste code in both editors to see differences
Hint: Paste original code on left, modified code on right, then click Compare to see differences highlighted.
Hint: Paste your code, customize font size and line numbers, then click Export PDF to download formatted code.
Hint: Paste your JWT token to decode and view its header, payload, and signature. The tool validates token structure and format.
Hint: Select conversion type, paste your data, and get instant conversion. Supports JSON, YAML, XML, Excel, PDF, and more.
Hint: Describe what you want to build or paste requirements, select target language, and click Generate.
Building modern web applications requires writing JavaScript for DOM manipulation, API calls, form validation, and interactive features. Our JavaScript code generator transforms your natural language descriptions into clean, modern ES6+ code that runs in browsers and Node.js. Whether you need to fetch data from an API, validate user input, or create dynamic UI components, simply describe your requirements and get working code instantly.
Perfect for frontend developers building React or Vue components, backend engineers creating Node.js servers, full-stack developers implementing authentication flows, or anyone who needs quick JavaScript snippets without memorizing every method and syntax detail. The generated code follows modern JavaScript best practices including async/await, arrow functions, template literals, and destructuring.
Generate code for selecting elements, modifying styles, adding event listeners, creating dynamic content, or building interactive forms. Get clean vanilla JavaScript or jQuery code for showing/hiding elements, validating inputs, handling clicks, or updating content based on user actions.
Example tasks: "Add click event to button that toggles dark mode", "Validate email format on form submit", "Create image carousel with next/previous buttons". Perfect for building interactive landing pages without heavy frameworks.
Create code for GET/POST requests to REST APIs, handling JSON responses, managing loading states, implementing error handling, and working with async/await patterns. Generate fetch calls with proper headers, authentication tokens, request bodies, and response parsing. Includes code for displaying API data in HTML or handling CORS issues.
If you're migrating server-side code to JavaScript, check out our Python to JavaScript converter for API endpoints or TypeScript to JavaScript converter for removing type annotations.
Generate modern JavaScript for filtering arrays, mapping data transformations, reducing to single values, finding specific items, sorting complex objects, or grouping data. Create code using ES6 methods like map, filter, reduce, find, and spread operators for clean, functional programming patterns. Perfect for processing API responses or transforming data for display.
Generate code for saving data to localStorage or sessionStorage, working with cookies, implementing shopping carts, persisting user preferences, or managing application state. Includes proper JSON serialization, expiration handling, and cross-tab synchronization for building stateful web applications.
Generate Express server code with routing, middleware, authentication, database connections, and error handling. Create REST API endpoints for CRUD operations, implement JWT authentication, handle file uploads with Multer, or set up CORS and rate limiting. Perfect for building backend services quickly.
Example: "Create Express server with user registration endpoint, hash passwords with bcrypt, and return JWT token"
Generate code for connecting to MongoDB with Mongoose schemas, MySQL with connection pooling, or PostgreSQL with pg library. Create queries for inserting documents, updating records, aggregation pipelines, joins, or transactions. Includes proper error handling and connection management for production applications.
Example: "Create Mongoose schema for blog posts with title, content, author, and timestamps. Add method to find published posts"
Generate Node.js fs module code for reading/writing files, processing CSV data, parsing JSON, working with streams for large files, watching directories for changes, or creating ZIP archives. Useful for building CLI tools, data processing scripts, or automation tasks.
Generate component code for React, Vue, or vanilla JavaScript applications
Generate React components with useState for managing local state, useEffect for side effects, useContext for global state, custom hooks for reusable logic, or useRef for DOM access. Create forms with validation, data fetching components, infinite scroll lists, or modal dialogs with proper event handling.
Example prompts: "React component with form that posts to API on submit", "Custom hook for fetching and caching user data", "Image gallery component with lazy loading"
Create Redux slices with actions and reducers, configure store with middleware, implement async thunks for API calls, or set up React Context providers for sharing state across components. Generate code for managing authentication state, shopping carts, or complex application data.
Example: "Redux slice for managing products with add to cart action and persist to localStorage"
Generate validation logic for email addresses, passwords, phone numbers, credit cards, or custom business rules. Create real-time validation with error messages, handle file uploads with preview, implement auto-save drafts, or build multi-step wizards with progress tracking. Works with vanilla JavaScript or frameworks like Formik and React Hook Form.
Get cleaner, more maintainable code by following these best practices
Mention whether you need browser JavaScript with DOM access or Node.js code with require/import. This ensures you get appropriate APIs like "fetch for browser" or "axios for Node.js", "localStorage" vs "fs.writeFile".
Good: "Node.js function to read file and parse JSON"
Better: "Browser JavaScript to fetch API data and update div element"
Ask for "ES6 arrow functions and async/await" for modern code, or "ES5 compatible with callbacks" for older browser support. This determines whether you get const/let or var, promises or callbacks, classes or function constructors.
Default generates modern ES6+. Request "ES5" explicitly for legacy support.
When generating code that manipulates DOM elements, mention the HTML structure: "HTML has div with id 'results'", "form with inputs named email and password", "button with class 'submit-btn'". This creates accurate selectors and prevents errors.
The generator will create getElementById, querySelector, or class-based selectors as appropriate
If building for React, Vue, or Angular, say so explicitly: "React component with hooks", "Vue 3 composition API", "Angular service with HttpClient". This generates framework-appropriate code with proper imports and patterns.
For legacy code, try our jQuery to JavaScript converter to modernize existing scripts
Migrating code to or from JavaScript? Our converters handle the translation:
Generate unit tests, integration tests, and debugging utilities
Generate test suites for your functions with describe blocks, test cases with assertions, mock API calls, test React components with React Testing Library, or create integration tests. Includes setup/teardown code, async test handling, and mocking dependencies. Perfect for maintaining code quality and preventing regressions.
Create try-catch blocks with meaningful error messages, implement custom error classes, add logging with Winston or Bunyan, track errors with Sentry integration, or build retry logic for failed operations. Generate code that gracefully handles network failures, invalid input, or unexpected conditions in production applications.
Describe what you want to build in plain English, select JavaScript as your target language, and click "Generate Code". Our AI will create clean, functional JavaScript code based on your description.
Yes! Sign up for a free account and get limited attempts per day with the Trial plan. For unlimited access, upgrade to the Monthly plan ($5/month) or purchase the Lifetime plan ($50) for one-time payment.
You can generate any JavaScript code including functions, classes, algorithms, API integrations, data structures, and complete applications. Just describe your requirements in detail.
Yes, our AI generates clean, well-structured JavaScript code following best practices. However, we recommend reviewing and testing all generated code before production use.
Yes, you can specify coding conventions, naming patterns, and style preferences in your description. The AI will adapt the generated JavaScript code accordingly.
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