Replay AI: The Ultimate Guide to Generating Full Stack React Applications From Video (2026)

TL;DR: Replay AI leverages video analysis and Gemini to generate complete, functional React applications, understanding user behavior and intent far beyond simple screenshot-to-code tools.

Replay AI: The Ultimate Guide to Generating Full Stack React Applications From Video (2026)#

The old way of building UI – endless design iterations, tedious coding, and constant rework – is dead. What if you could simply show an AI what you want and have it generate the code for you? That’s the promise of Replay AI, and it's here today.

Replay AI is a revolutionary video-to-code engine that uses the power of Gemini to reconstruct working UI from screen recordings. Unlike traditional screenshot-to-code tools, Replay analyzes video to understand user behavior and intent. It doesn't just see pixels; it understands what users are trying to achieve.

Behavior-Driven Reconstruction: The Key to Replay's Power#

Replay uses "Behavior-Driven Reconstruction," treating video as the single source of truth. This approach allows Replay to generate more than just static UI; it creates interactive, functional components and applications that mirror the user's intended workflow. Forget static mockups - Replay delivers working code.

Key Features of Replay AI#

Replay offers a powerful suite of features designed to streamline the development process:

• •Multi-page Generation: Replay can analyze videos spanning multiple pages and interactions, creating complete application flows.
• •Supabase Integration: Seamlessly integrate with Supabase for backend functionality, data storage, and authentication.
• •Style Injection: Apply custom styles and themes to your generated components for a consistent and polished look.
• •Product Flow Maps: Visualize the user flow captured in the video, providing a clear overview of the application's structure.

How Replay AI Works: A Step-by-Step Guide#

Let's walk through the process of generating a React application using Replay AI.

Step 1: Record Your User Flow#

The first step is to record a video of the user flow you want to replicate. This could be anything from a simple login process to a complex e-commerce transaction. The clearer and more deliberate your actions in the video, the better the results will be.

💡 Pro Tip: Speak clearly and narrate your actions while recording the video. This provides additional context for Replay's AI engine.

Step 2: Upload and Analyze the Video#

Upload your video to the Replay platform. Replay's AI engine will then analyze the video, identifying UI elements, user interactions, and underlying logic. This process can take a few minutes depending on the length and complexity of the video.

Step 3: Review and Refine the Generated Code#

Once the analysis is complete, Replay will generate React code based on the video. Review the code and make any necessary refinements. You can adjust styles, modify logic, and add additional features as needed.

Step 4: Integrate with Supabase (Optional)#

If your application requires backend functionality, you can seamlessly integrate with Supabase. Replay can automatically generate the necessary API calls and data models based on your video.

Step 5: Deploy Your Application#

Once you're satisfied with the generated code, you can deploy your application to your hosting provider of choice. Replay supports a variety of deployment options, including Vercel, Netlify, and AWS.

Replay AI in Action: A Real-World Example#

Let's say you want to create a simple to-do list application. You record a video demonstrating the following actions:

1. •Adding a new to-do item.
2. •Marking a to-do item as complete.
3. •Deleting a to-do item.

After uploading the video to Replay, the AI engine generates the following React code (simplified for brevity):

typescript
// Generated by Replay AI
import React, { useState } from 'react';

interface Todo {
  id: number;
  text: string;
  completed: boolean;
}

const TodoList: React.FC = () => {
  const [todos, setTodos] = useState<Todo[]>([]);
  const [newTodo, setNewTodo] = useState('');

  const addTodo = () => {
    if (newTodo.trim() !== '') {
      setTodos([...todos, { id: Date.now(), text: newTodo, completed: false }]);
      setNewTodo('');
    }
  };

  const toggleComplete = (id: number) => {
    setTodos(
      todos.map((todo) =>
        todo.id === id ? { ...todo, completed: !todo.completed } : todo
      )
    );
  };

  const deleteTodo = (id: number) => {
    setTodos(todos.filter((todo) => todo.id !== id));
  };

  return (
    <div>
      <input
        type="text"
        value={newTodo}
        onChange={(e) => setNewTodo(e.target.value)}
      />
      <button onClick={addTodo}>Add</button>
      <ul>
        {todos.map((todo) => (
          <li key={todo.id}>
            <input
              type="checkbox"
              checked={todo.completed}
              onChange={() => toggleComplete(todo.id)}
            />
            <span>{todo.text}</span>
            <button onClick={() => deleteTodo(todo.id)}>Delete</button>
          </li>
        ))}
      </ul>
    </div>
  );
};

export default TodoList;

This code provides a basic, functional to-do list application that you can further customize and enhance.

Replay AI vs. Traditional UI Development Tools#

Replay AI offers significant advantages over traditional UI development tools:

Beyond Basic UI: Understanding Product Flow Maps#

Replay doesn't just generate code; it generates understanding. The "Product Flow Maps" feature visualizes the user's journey through your application, revealing key interactions and potential bottlenecks. This insight is invaluable for optimizing the user experience and improving conversion rates. Replay helps you understand how users actually interact with your product, not just how you think they do.

⚠️ Warning: While Replay can generate impressive code, it's crucial to review and refine the output. AI is powerful, but human oversight is still essential for ensuring quality and security.

Integrating with Supabase: Building Full-Stack Applications#

Replay's integration with Supabase makes building full-stack applications incredibly straightforward. By analyzing the video, Replay can infer the necessary database schema, API endpoints, and authentication logic. This eliminates much of the boilerplate code typically associated with backend development, allowing you to focus on the core features of your application.

Here's an example of how Replay might generate Supabase integration code:

typescript
// Example of Supabase integration generated by Replay
import { createClient } from '@supabase/supabase-js';

const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL;
const supabaseAnonKey = process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY;

export const supabase = createClient(supabaseUrl, supabaseAnonKey);

export const getTodos = async () => {
  const { data, error } = await supabase
    .from('todos')
    .select('*')
    .order('created_at', { ascending: false });

  if (error) {
    console.error('Error fetching todos:', error);
    return [];
  }

  return data;
};

This code snippet demonstrates how Replay can automatically configure a Supabase client and generate a function to fetch to-do items from a database.

📝 Note: Ensure your Supabase environment variables are properly configured for the generated code to function correctly.

Frequently Asked Questions#

Is Replay free to use?#

Replay offers a free tier with limited features and usage. Paid plans are available for more advanced features and higher usage limits. Check the Replay website for the latest pricing information.

How is Replay different from v0.dev?#

While both Replay and v0.dev aim to automate UI development, they differ significantly in their approach. v0.dev primarily uses text prompts to generate UI components, while Replay analyzes video recordings to understand user behavior and intent. Replay's behavior-driven reconstruction allows it to generate more complete and functional applications than screenshot-to-code tools.

What types of applications can I build with Replay?#

Replay can be used to build a wide range of applications, from simple to-do lists to complex e-commerce platforms. The key is to record a clear and comprehensive video of the user flow you want to replicate.

What if the generated code isn't perfect?#

Replay's AI engine is constantly learning and improving, but it's not perfect. You may need to make some adjustments to the generated code to achieve the desired result. However, Replay can significantly reduce the amount of manual coding required, saving you time and effort.

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Ready to try behavior-driven code generation? Get started with Replay - transform any video into working code in seconds.