Replay AI: Building Accessible UI from User Flow Videos (2026)

TL;DR: Replay AI bridges the gap between user experience videos and functional UI code, leveraging behavior-driven reconstruction to create accessible web applications.

Replay AI: Building Accessible UI from User Flow Videos (2026)#

The promise of AI-powered code generation is here, but existing solutions often fall short. Screenshot-to-code tools provide a static representation, missing the dynamic user interactions crucial for building truly functional and accessible UIs. What if you could transform videos of user flows into working code, understanding user intent instead of just visual elements? That's the power of Replay.

Replay leverages a novel approach called "Behavior-Driven Reconstruction." Instead of simply converting pixels into code, Replay analyzes the video to understand what the user is trying to accomplish. This allows Replay to generate code that accurately reflects the intended functionality and user experience, ensuring accessibility from the ground up.

The Problem with Traditional Approaches#

Traditional screenshot-to-code tools are limited by their static nature. They can generate code based on visual elements, but they lack the ability to understand user behavior or the dynamic nature of web applications. This often results in code that is visually similar but functionally incomplete, requiring significant manual effort to make it truly usable and accessible.

Replay addresses these limitations by analyzing video as the source of truth. This allows Replay to capture user interactions, understand the intended functionality, and generate code that accurately reflects the user experience.

Introducing Replay: Behavior-Driven Reconstruction#

Replay isn't just another code generation tool. It's a video-to-code engine that uses Gemini to reconstruct working UI from screen recordings. By focusing on user behavior, Replay can generate code that is not only visually accurate but also functionally complete and accessible.

Here's how it works:

1. •Video Analysis: Replay analyzes the video to identify user interactions, UI elements, and overall flow.
2. •Behavior Interpretation: Replay uses Gemini to interpret the user's intent based on their actions.
3. •Code Generation: Replay generates code that reflects the intended functionality and user experience.
4. •Accessibility Integration: Replay automatically incorporates accessibility best practices into the generated code.

Key Features of Replay#

Replay offers a range of features designed to streamline the UI development process:

• •Multi-Page Generation: Generate code for entire user flows across multiple pages.
• •Supabase Integration: Seamlessly integrate with Supabase for backend functionality.
• •Style Injection: Customize the look and feel of your UI with style injection.
• •Product Flow Maps: Visualize the user flow with automatically generated product flow maps.

Building an Accessible UI with Replay: A Step-by-Step Guide#

Let's walk through a practical example of using Replay to build an accessible UI from a user flow video. Imagine you have a video recording of a user signing up for a newsletter.

Step 1: Upload the Video to Replay#

Upload the video recording of the user signing up for the newsletter to the Replay platform. Replay will automatically analyze the video and identify the key UI elements and user interactions.

Step 2: Review the Generated Code#

Replay will generate code that reflects the user flow in the video. Review the generated code to ensure that it accurately captures the intended functionality.

typescript
// Example generated code for a newsletter signup form
import { useState } from 'react';

const NewsletterSignup = () => {
  const [email, setEmail] = useState('');
  const [subscribed, setSubscribed] = useState(false);

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    // Simulate API call to subscribe to newsletter
    try {
      const response = await fetch('/api/subscribe', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({ email }),
      });

      if (response.ok) {
        setSubscribed(true);
      } else {
        console.error('Subscription failed');
      }
    } catch (error) {
      console.error('Error subscribing:', error);
    }
  };

  return (
    <form onSubmit={handleSubmit}>
      <label htmlFor="email">
        Email:
        <input
          type="email"
          id="email"
          value={email}
          onChange={(e) => setEmail(e.target.value)}
          aria-label="Enter your email address to subscribe to our newsletter"
          required
        />
      </label>
      <button type="submit" disabled={subscribed}>
        {subscribed ? 'Subscribed!' : 'Subscribe'}
      </button>
    </form>
  );
};

export default NewsletterSignup;

💡 Pro Tip: Replay automatically adds

text

aria-label

attributes to input fields to improve accessibility.

Step 3: Customize the UI with Style Injection#

Use Replay's style injection feature to customize the look and feel of the UI. You can use CSS or other styling languages to create a visually appealing and consistent user experience.

css
/* Example style injection to customize the newsletter signup form */
form {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  border: 1px solid #ccc;
  border-radius: 5px;
}

label {
  margin-bottom: 10px;
}

input {
  padding: 5px;
  border: 1px solid #ccc;
  border-radius: 3px;
}

button {
  padding: 10px 20px;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:disabled {
  background-color: #ccc;
  cursor: not-allowed;
}

Step 4: Integrate with Supabase#

Use Replay's Supabase integration to connect the UI to a backend database. This allows you to store user data, manage subscriptions, and perform other backend tasks.

📝 Note: Replay automatically generates the necessary API endpoints for interacting with Supabase.

Ensuring Accessibility with Replay#

Replay prioritizes accessibility by automatically incorporating accessibility best practices into the generated code. This includes:

• •Semantic HTML: Replay uses semantic HTML elements to ensure that the UI is structured in a way that is accessible to assistive technologies.
• •ARIA Attributes: Replay automatically adds ARIA attributes to UI elements to provide additional context and information to assistive technologies.
• •Keyboard Navigation: Replay ensures that the UI is fully navigable using the keyboard.
• •Color Contrast: Replay checks for sufficient color contrast to ensure that the UI is readable for users with visual impairments.

⚠️ Warning: While Replay automates many accessibility tasks, it's crucial to manually test the generated UI with assistive technologies to ensure full accessibility.

The Future of UI Development with Replay#

Replay represents a significant step forward in the field of AI-powered code generation. By focusing on user behavior and accessibility, Replay empowers developers to build truly functional and inclusive web applications. As AI technology continues to evolve, Replay will play an increasingly important role in shaping the future of UI development.

Here's a comparison with another popular AI code generation tool:

Benefits of Using Replay#

• •Faster Development: Generate code in seconds, saving valuable development time.
• •Improved Accessibility: Ensure that your UI is accessible to all users.
• •Enhanced User Experience: Create UIs that accurately reflect user intent.
• •Reduced Manual Effort: Automate repetitive coding tasks.

Frequently Asked Questions#

Is Replay free to use?#

Replay offers a free tier with limited features. Paid plans are available for users who need more advanced functionality.

How is Replay different from v0.dev?#

Replay uses video input and behavior analysis to generate code, while v0.dev relies on text prompts. Replay also has a stronger focus on accessibility and backend integration.

What types of videos can Replay analyze?#

Replay can analyze any video recording of a user interacting with a web application.

What coding languages does Replay support?#

Replay currently supports React and Next.js, with plans to support other languages in the future.

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