Replay AI: Building Production-Ready React Apps from Video in 3 Simple Steps (2026)

TL;DR: Replay AI leverages video analysis to generate production-ready React applications, understanding user behavior and translating it into functional code.

The dream of automatically generating functional UI from design mockups has been around for years. Screenshot-to-code tools promised a revolution, but often fell short, producing brittle code that lacked the crucial element: understanding user intent. They only saw what was on the screen, not what the user was trying to do.

Enter Replay, a video-to-code engine powered by Gemini, that's changing the game. Instead of relying on static images, Replay analyzes video recordings of user interactions to reconstruct fully functional UI components and applications. It's not just about pixels; it's about behavior-driven reconstruction. Let's dive into how you can build production-ready React apps from video in just three simple steps.

Why Video-to-Code is the Future#

The key difference between Replay and traditional screenshot-to-code tools lies in its ability to analyze video. This allows Replay to:

• •Understand user flows and interactions.
• •Infer the underlying logic and data dependencies.
• •Generate more robust and maintainable code.

Think about it: a static image of a form doesn't tell you what happens when a user clicks "Submit." A video does. This context is critical for building applications that actually work. Replay uses this behavior analysis to create code that mirrors the user's intended experience.

Step 1: Capture and Upload Your Video#

This is the easiest step. Simply record a video of yourself (or a user) interacting with the UI you want to recreate. This could be a demo of an existing website, a prototype in Figma, or even a hand-drawn mockup you're interacting with. The clearer the video, the better the results.

💡 Pro Tip: Narrate your actions while recording. Saying things like "Now I'm clicking the 'Submit' button" can significantly improve Replay's understanding of the user flow.

Once you have your video, upload it to the Replay platform. Replay supports various video formats (MP4, MOV, etc.) and resolutions.

Step 2: Replay AI Analysis and Reconstruction#

This is where the magic happens. Replay's AI engine, powered by Gemini, analyzes the video frame by frame. It identifies UI elements, tracks user interactions, and infers the underlying logic. This process involves:

• •Object Detection: Identifying buttons, text fields, images, and other UI components.
• •Behavior Analysis: Understanding user actions like clicks, scrolls, and form submissions.
• •State Management Inference: Determining how the UI changes in response to user interactions.
• •Code Generation: Translating the analyzed behavior into React code.

Replay then generates a working React codebase, complete with components, styling, and event handlers. You can preview the generated code and UI within the Replay platform.

📝 Note: The analysis process can take a few minutes depending on the length and complexity of the video.

Step 3: Customize and Deploy Your App#

The generated code is a great starting point, but you'll likely want to customize it to fit your specific needs. Replay offers several features to help you refine your application:

• •Code Editing: Directly edit the generated code within the Replay platform.
• •Style Injection: Apply custom CSS or theme your application using Tailwind CSS.
• •Supabase Integration: Connect your app to a Supabase database for data persistence.
• •Multi-Page Generation: Replay can generate multi-page applications from videos that demonstrate navigation between different screens.
• •Product Flow Maps: Visualize the user flow and interactions captured in the video, allowing you to easily understand and modify the application's behavior.

Once you're happy with your app, you can download the codebase and deploy it to your favorite hosting platform (Netlify, Vercel, etc.).

typescript
// Example of a generated React component with event handler
import React, { useState } from 'react';

const MyButton = () => {
  const [count, setCount] = useState(0);

  const handleClick = () => {
    setCount(count + 1);
  };

  return (
    <button onClick={handleClick}>
      Clicked {count} times
    </button>
  );
};

export default MyButton;

This code snippet demonstrates a simple button component with a click handler that updates a counter. Replay can generate similar code for more complex UI elements and interactions.

Replay vs. Traditional Screenshot-to-Code Tools#

Here's a comparison of Replay with traditional screenshot-to-code tools:

As you can see, Replay offers significant advantages over traditional screenshot-to-code tools. Its ability to analyze video and understand user behavior results in more robust, maintainable, and functional code.

Addressing Common Concerns#

You might be wondering about the accuracy and reliability of Replay's code generation. Here are some common concerns and how Replay addresses them:

• •Accuracy: Replay's AI engine is constantly being trained and improved to increase its accuracy. The quality of the input video also plays a crucial role. Clear, well-narrated videos will yield the best results.
• •Complexity: Replay can handle complex UIs and user flows, but the more complex the application, the more likely you'll need to customize the generated code.
• •Security: Replay does not store your video data permanently. It's processed securely and deleted after the code generation is complete.

⚠️ Warning: Replay is a powerful tool, but it's not a magic bullet. You'll still need to have a solid understanding of React and web development to customize and maintain the generated code.

Why Replay Stands Out#

Replay isn't just another code generation tool; it's a paradigm shift in how we approach UI development. Here's why Replay is a game-changer:

• •Behavior-Driven Reconstruction: Focuses on user intent, not just visual appearance.
• •Faster Development: Accelerates the UI development process by automating code generation.
• •Improved Code Quality: Generates more robust and maintainable code compared to screenshot-to-code tools.
• •Enhanced Collaboration: Allows designers and developers to collaborate more effectively by using video as a common language.
• •Rapid Prototyping: Quickly create working prototypes from simple video recordings.

Frequently Asked Questions#

Is Replay free to use?#

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

How is Replay different from v0.dev?#

While v0.dev uses text prompts to generate UI, Replay uses video analysis. Replay understands user behavior and interactions, resulting in more functional and context-aware code. Think of it this way: v0.dev understands what you want, Replay understands how you want it to work.

What kind of applications can I build with Replay?#

You can build a wide range of applications with Replay, from simple landing pages to complex web applications with multiple pages and data interactions.

What if the generated code isn't perfect?#

The generated code is a starting point. You can always customize and refine it to meet your specific needs. Replay provides tools for editing the code, injecting styles, and integrating with databases.

What frameworks and libraries does Replay support?#

Currently, Replay primarily supports React. Future versions may support other frameworks like Vue.js and Angular.

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