Replay AI: Converting UI Design Patterns from Video to Code (2026)

TL;DR: Replay AI uses video analysis and behavior-driven reconstruction to generate working UI code, understanding user intent beyond just visual elements.

The Future is Now: Replay AI and Behavior-Driven UI Reconstruction#

The traditional approach to UI development often involves a fragmented process: design mockups, static prototypes, and then the painstaking task of translating these into functional code. This process is time-consuming, error-prone, and often fails to capture the nuances of intended user behavior. What if you could simply record a video of the desired UI interaction and have working code generated automatically? Enter Replay AI.

Replay is a game-changing video-to-code engine that leverages the power of Gemini to reconstruct working UIs from screen recordings. Unlike traditional screenshot-to-code tools, Replay understands what users are trying to achieve, not just what they see. This "Behavior-Driven Reconstruction" (BDR) approach makes Replay uniquely powerful.

Why Video? The Power of Behavior-Driven Reconstruction#

The key innovation behind Replay lies in its ability to analyze video, not just static images. Video captures the dynamic flow of user interactions, including clicks, scrolls, form submissions, and animations. This rich data stream allows Replay to infer user intent and generate code that accurately reflects the desired functionality.

Consider a simple example: a user clicking a button to add an item to a shopping cart. A screenshot-to-code tool might identify the button and its visual appearance. However, Replay understands that the user is adding an item to the cart, triggering a state change and potentially updating the cart display. This understanding enables Replay to generate code that handles the entire interaction flow, not just the button's visual representation.

Replay AI in Action: Key Features and Implementation#

Replay offers a suite of features designed to streamline UI development and empower developers to build complex applications with ease.

• •Multi-Page Generation: Replay can analyze videos spanning multiple pages or views, generating code for entire application flows.
• •Supabase Integration: Seamlessly integrate your generated UI with Supabase for backend functionality, data storage, and authentication.
• •Style Injection: Customize the appearance of your generated UI with CSS or styled-components, ensuring a consistent look and feel.
• •Product Flow Maps: Visualize the user flow captured in the video, providing a clear understanding of the application's structure and behavior.

Let's dive into a practical example of using Replay to generate code for a simple login form.

Step 1: Record the Interaction#

Record a video of yourself interacting with a login form. Show the entire flow, from entering your username and password to clicking the "Login" button. Make sure the video is clear and captures all relevant interactions.

Step 2: Upload and Analyze with Replay#

Upload the video to Replay. The AI engine will analyze the video and identify the UI elements, user interactions, and underlying logic.

Step 3: Review and Customize the Generated Code#

Replay will generate code for the login form, including HTML, CSS, and JavaScript. Review the generated code and make any necessary customizations.

typescript
// Example generated code (simplified)
import React, { useState } from 'react';

const LoginForm = () => {
  const [username, setUsername] = useState('');
  const [password, setPassword] = useState('');

  const handleSubmit = async (event) => {
    event.preventDefault();
    // Simulate API call to authenticate user
    const response = await fetch('/api/login', {
      method: 'POST',
      body: JSON.stringify({ username, password }),
      headers: { 'Content-Type': 'application/json' },
    });

    if (response.ok) {
      // Redirect to dashboard
      window.location.href = '/dashboard';
    } else {
      // Display error message
      alert('Invalid username or password');
    }
  };

  return (
    <form onSubmit={handleSubmit}>
      <label htmlFor="username">Username:</label>
      <input
        type="text"
        id="username"
        value={username}
        onChange={(e) => setUsername(e.target.value)}
      />

      <label htmlFor="password">Password:</label>
      <input
        type="password"
        id="password"
        value={password}
        onChange={(e) => setPassword(e.target.value)}
      />

      <button type="submit">Login</button>
    </form>
  );
};

export default LoginForm;

💡 Pro Tip: Replay's code generation is highly customizable. You can specify the desired framework (React, Vue, Angular), styling library (CSS, styled-components), and backend integration (Supabase, Firebase).

Step 4: Integrate with Supabase (Optional)#

If you're using Supabase, Replay can automatically generate the necessary code to integrate the login form with your Supabase authentication system. This includes handling user registration, login, and session management.

javascript
// Example Supabase integration (simplified)
import { createClient } from '@supabase/supabase-js';

const supabaseUrl = 'YOUR_SUPABASE_URL';
const supabaseKey = 'YOUR_SUPABASE_ANON_KEY';
const supabase = createClient(supabaseUrl, supabaseKey);

const handleSubmit = async (event) => {
  event.preventDefault();
  const { error } = await supabase.auth.signInWithPassword({
    email: username, // Assuming username is email in this example
    password: password,
  });

  if (error) {
    console.error('Error signing in:', error.message);
    alert('Invalid username or password');
  } else {
    console.log('Successfully signed in!');
    // Redirect to dashboard
    window.location.href = '/dashboard';
  }
};

⚠️ Warning: Remember to replace

text

YOUR_SUPABASE_URL

and

text

YOUR_SUPABASE_ANON_KEY

with your actual Supabase credentials. Never commit your

text

supabaseKey

to a public repository. Use environment variables instead.

Replay AI: A Comparative Analysis#

How does Replay stack up against other UI generation tools? Let's take a look:

📝 Note: "Screenshot-to-Code Tools" generally focus on visual replication. "Low-Code Platforms" offer visual UI builders but can be restrictive for complex logic. Replay bridges the gap by capturing behavior and generating customizable code.

Benefits of Using Replay#

• •Accelerated Development: Generate working UI code in minutes, saving valuable development time.
• •Improved Accuracy: Capture user intent and behavior accurately, reducing errors and rework.
• •Enhanced Collaboration: Facilitate communication between designers and developers by providing a clear and concise representation of the desired UI.
• •Reduced Costs: Lower development costs by automating the code generation process.
• •Increased Innovation: Free up developers to focus on more complex tasks and innovative features.

The Future of UI Development with Replay#

Replay represents a significant step forward in UI development. By leveraging the power of video analysis and behavior-driven reconstruction, Replay empowers developers to build complex applications with greater speed, accuracy, and efficiency. As AI technology continues to evolve, we can expect even more sophisticated tools like Replay to emerge, further transforming the way we create and interact with software.

Frequently Asked Questions#

Is Replay free to use?#

Replay offers a free tier with limited usage. Paid plans are available for higher usage limits and access to advanced features.

How is Replay different from v0.dev?#

v0.dev primarily generates UI components based on text prompts. Replay, on the other hand, analyzes video recordings of user interactions to generate complete UI flows, understanding the underlying behavior and context. Replay focuses on capturing and replicating behavior, not just visual appearance.

What frameworks does Replay support?#

Currently, Replay supports React, Vue, and Angular. Support for additional frameworks is planned for future releases.

Can Replay generate code for complex animations?#

Yes, Replay can analyze videos of complex animations and generate the corresponding code. However, the accuracy of the generated code may vary depending on the complexity of the animation.

How secure is Replay?#

Replay uses industry-standard security measures to protect user data. All video uploads and code generation processes are encrypted.

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