Replay AI: Convert Video Redesigns into Code without Breaking Legacy Apps (2026)

TL;DR: Replay AI bridges the gap between design iteration and legacy application maintenance by converting video recordings of UI redesigns directly into functional code, minimizing disruption and maximizing efficiency.

The 2026 UI Redesign Dilemma: Video is the New Spec#

Legacy applications. We all have them. They’re the bedrock of our businesses, but updating their user interfaces often feels like navigating a minefield. Traditional redesign processes involve static mockups, lengthy spec documents, and a constant back-and-forth between designers and developers, often leading to misinterpretations and integration nightmares. In 2026, a new paradigm is emerging: video-driven development. Instead of static screens, we're using recordings of actual UI interactions as the source of truth.

This is where Replay comes in.

Replay AI leverages the power of video analysis and behavior-driven reconstruction to transform screen recordings of UI redesigns into fully functional code. This approach drastically reduces the ambiguity inherent in traditional design handoffs and ensures that the final implementation accurately reflects the intended user experience.

Beyond Screenshots: Behavior-Driven Reconstruction#

Screenshot-to-code tools have been around for a while, but they fundamentally misunderstand the problem. They only capture the visual representation of a UI at a single point in time. They lack the contextual understanding of how a user interacts with the interface.

Replay takes a different approach. It analyzes the video itself, understanding user behavior and intent. This "Behavior-Driven Reconstruction" allows Replay to generate code that not only looks right but also behaves as intended.

Here's a comparison:

Replay leverages Google's Gemini to understand the semantic meaning behind user actions in the video. This allows it to generate cleaner, more maintainable code.

Replay in Action: A Real-World Example#

Let's say you want to redesign the user profile page in your legacy e-commerce application. Instead of creating static mockups, you record a video of yourself interacting with the redesigned interface in a prototyping tool like Figma or Framer. You demonstrate navigating to the profile page, editing your address, changing your password, and updating your notification preferences.

Here's how you can use Replay to convert that video into code:

Step 1: Upload the Video to Replay#

Simply upload the video recording to the Replay platform.

Step 2: Replay Analyzes the Video#

Replay analyzes the video, identifying UI elements, user interactions (clicks, scrolls, form submissions), and transitions between pages.

Step 3: Code Generation and Review#

Replay generates the corresponding code (React, Angular, Vue.js – your choice) based on your configurations. You can review the generated code and make any necessary adjustments.

Step 4: Seamless Integration#

Replay offers several integration options, including:

• •Component Export: Export individual components to integrate into your existing codebase.
• •Style Injection: Inject the generated styles directly into your legacy application. This is particularly useful for modernizing the look and feel without rewriting the entire UI.
• •Supabase Integration: Replay can automatically generate Supabase schemas and queries based on the data interactions in the video.

Here's a snippet of code that Replay might generate for a "Save Changes" button:

typescript
// React component generated by Replay
import React, { useState } from 'react';

const SaveChangesButton = () => {
  const [isLoading, setIsLoading] = useState(false);

  const handleClick = async () => {
    setIsLoading(true);
    try {
      // Simulate API call to save changes
      await new Promise(resolve => setTimeout(resolve, 1000));
      console.log('Changes saved successfully!');
    } catch (error) {
      console.error('Error saving changes:', error);
    } finally {
      setIsLoading(false);
    }
  };

  return (
    <button onClick={handleClick} disabled={isLoading}>
      {isLoading ? 'Saving...' : 'Save Changes'}
    </button>
  );
};

export default SaveChangesButton;

💡 Pro Tip: For best results, ensure your video recording is clear, well-lit, and free of distractions. Clearly articulate the purpose of each interaction in the video.

Key Features of Replay#

Replay offers a comprehensive suite of features designed to streamline the UI redesign process:

• •Multi-Page Generation: Replay can generate code for entire user flows, not just individual pages.
• •Supabase Integration: Automatically generate Supabase schemas and queries based on the data interactions in the video. This significantly speeds up backend development.
• •Style Injection: Inject generated styles directly into your legacy application for quick and easy modernization.
• •Product Flow Maps: Visualize the user flow captured in the video, providing a clear overview of the application's logic.
• •Customizable Code Generation: Tailor the generated code to match your existing coding style and conventions.
• •Version Control Integration: Integrate with Git to track changes and collaborate with your team.

Minimizing Disruption to Legacy Apps#

One of the biggest challenges of UI redesigns is minimizing disruption to existing functionality. Replay addresses this challenge through its style injection and component-based integration options. By injecting styles directly into the legacy application, you can quickly update the look and feel without rewriting the underlying code.

⚠️ Warning: While Replay aims to generate production-ready code, always thoroughly test the generated code in a staging environment before deploying to production.

The Future of UI Development: Video as the Source of Truth#

Replay represents a significant shift in the way we approach UI development. By using video as the source of truth, we can eliminate ambiguity, reduce development time, and ensure that the final implementation accurately reflects the intended user experience.

📝 Note: Replay is constantly evolving, with new features and integrations being added regularly. Stay tuned for future updates!

Frequently Asked Questions#

Is Replay free to use?#

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

How is Replay different from v0.dev?#

While both tools aim to generate code, Replay focuses on understanding user behavior from video to reconstruct UIs, while v0.dev primarily uses text prompts. Replay excels at capturing complex interactions and replicating existing UI flows, making it ideal for modernizing legacy applications. V0.dev is better suited for generating new UIs from scratch. Replay analyzes video, not screenshots.

What types of videos can Replay process?#

Replay can process screen recordings from a variety of sources, including prototyping tools (Figma, Framer), screen recording software (OBS Studio, QuickTime), and even mobile devices.

What code languages and frameworks does Replay support?#

Replay currently supports React, Angular, and Vue.js. Support for other languages and frameworks is planned for future releases.

How secure is Replay?#

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

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