Replay AI: Building Accessible UI from Design Mockups (2026)

TL;DR: Replay AI revolutionizes UI development by reconstructing fully functional, accessible UI directly from video recordings of design mockups, bridging the gap between design and code with unprecedented accuracy and speed.

The days of painstakingly translating static design mockups into functional code are numbered. In 2026, we're moving beyond pixel-perfect reproductions and embracing behavior-driven reconstruction. The future is Replay AI, and it's about understanding intent from video.

The Broken Promise of Screenshot-to-Code#

Let's be honest: screenshot-to-code tools have always fallen short. They can generate a basic visual layout, but they fail to capture the dynamic behavior and user interactions that define a truly great user experience. They treat the UI as a static image, not a living, breathing application. This leaves developers with the tedious task of adding functionality, accessibility features, and often, completely rewriting large portions of the generated code.

Replay takes a different approach. Instead of analyzing static images, Replay analyzes video. This seemingly simple shift unlocks a whole new level of understanding. By observing user interactions within the video, Replay can infer the intended behavior of each UI element, reconstruct complex multi-page flows, and even inject semantic styling to ensure accessibility from the outset.

Behavior-Driven Reconstruction: Video as the Source of Truth#

Replay's core innovation is "Behavior-Driven Reconstruction." This means the video recording of the design mockup serves as the single source of truth for the final UI. Replay uses Gemini to analyze the video, identifying UI elements, user interactions (clicks, scrolls, form submissions), and overall product flow. This understanding is then translated into clean, functional code.

Here's how it works:

1. •

   Video Capture: Record a video walkthrough of your design mockup. This could be a Figma prototype, a hand-drawn wireframe, or even a user testing session. The more detailed the video, the better Replay can understand the intended behavior.

2. •

   AI-Powered Analysis: Upload the video to Replay. Our AI engine, powered by Gemini, analyzes the video, identifying UI elements, user interactions, and overall product flow.

3. •

   Code Generation: Replay generates clean, functional code that replicates the behavior observed in the video. This includes HTML, CSS, and JavaScript (or your preferred framework like React, Vue, or Angular).

4. •

   Refinement and Customization: Review the generated code and make any necessary refinements. Replay provides tools for easily customizing the generated code and integrating it into your existing codebase.

Step 1: Recording Your Design Mockup#

The key to successful reconstruction is a clear and comprehensive video.

💡 Pro Tip: Narrate your actions during the recording. This provides valuable context for Replay's AI engine and improves the accuracy of the reconstruction.

Step 2: Uploading and Analyzing the Video#

Uploading is simple. Once uploaded, Replay automatically begins analyzing the video. This process can take a few minutes, depending on the length and complexity of the video.

Step 3: Reviewing and Refining the Generated Code#

After the analysis is complete, Replay presents you with the generated code. This is where you can review the code, make any necessary adjustments, and customize the UI to your liking.

Accessibility Built-In: Semantic Styling from the Start#

Accessibility is often an afterthought in UI development. Replay addresses this by injecting semantic styling into the generated code from the beginning. By understanding the intended function of each UI element, Replay can automatically add ARIA attributes, semantic HTML tags, and other accessibility features.

For example, if Replay detects a series of clickable elements arranged in a row, it might infer that this is a navigation menu and automatically add the appropriate

and tags.

html
// Example of accessibility injection by Replay
<nav aria-label="Main Navigation">
  <ul>
    <li><a href="/">Home</a></li>
    <li><a href="/about">About</a></li>
    <li><a href="/contact">Contact</a></li>
  </ul>
</nav>

This proactive approach to accessibility not only saves developers time but also ensures that the final UI is usable by everyone, regardless of their abilities.

⚠️ Warning: While Replay automates accessibility, it's crucial to conduct thorough testing with assistive technologies to ensure full compliance with accessibility standards.

Supabase Integration: Backend-Ready from Day One#

Replay seamlessly integrates with Supabase, allowing you to generate backend-ready code from your design mockups. This means you can quickly create fully functional applications with real-time data synchronization and authentication.

Replay can analyze form submissions in the video and automatically generate the corresponding Supabase database schema and API endpoints. This eliminates the need for manual backend setup, saving you valuable time and effort.

Multi-Page Flow Generation: Reconstructing the Entire User Journey#

Traditional screenshot-to-code tools are limited to generating code for a single page at a time. Replay, on the other hand, can analyze multi-page videos and reconstruct the entire user journey. This is particularly useful for complex applications with multiple interconnected screens.

Replay can identify the relationships between different pages, generate navigation links, and even handle data transfer between pages. This allows you to quickly prototype and build complex applications with ease.

Style Injection: Maintaining Design Consistency#

Replay allows you to inject your existing CSS styles into the generated code, ensuring design consistency across your application. You can upload your CSS file or provide a link to your style guide, and Replay will automatically apply your styles to the generated UI elements.

This feature is particularly useful for teams working on large projects with established design systems. It ensures that the generated code adheres to the company's branding guidelines and maintains a consistent look and feel.

Product Flow Maps: Visualizing the User Journey#

Replay generates a visual product flow map from the video, providing a clear overview of the user journey. This map shows the different pages in the application, the navigation links between them, and the user interactions that trigger transitions between pages.

This visual representation is invaluable for understanding the overall structure of the application and identifying potential usability issues. It also facilitates collaboration between designers and developers, ensuring that everyone is on the same page.

Why Replay?#

• •Speed: Generate functional UI code in minutes, not hours.
• •Accuracy: Reconstruct the intended behavior of your UI with unprecedented accuracy.
• •Accessibility: Build accessible UIs from the start with semantic styling.
• •Integration: Seamlessly integrate with Supabase and your existing codebase.
• •Collaboration: Facilitate collaboration between designers and developers with visual product flow maps.

typescript
// Example of generated Supabase code
const insertData = async (data: any) => {
  const { data, error } = await supabase
    .from('your_table')
    .insert([ data ])
  if (error) {
    console.error("Error inserting data: ", error);
  } else {
    console.log("Data inserted successfully!");
  }
}

📝 Note: Replay is constantly evolving. We're committed to adding new features and improving the accuracy and efficiency of our AI engine.

Frequently Asked Questions#

Is Replay free to use?#

Replay offers a free tier with limited features and usage. We also offer paid plans with more advanced features and higher usage limits. Check out our pricing page for more details.

How is Replay different from v0.dev?#

While v0.dev focuses on generating UI components from text prompts, Replay reconstructs entire UI flows from video recordings. Replay understands user behavior and intent, allowing it to generate more accurate and functional code. Replay excels where complex interactions and multi-page flows are required.

What frameworks does Replay support?#

Currently, Replay supports React, Vue, and Angular. We are planning to add support for other frameworks in the future.

What types of videos can Replay analyze?#

Replay can analyze videos of design mockups, prototypes, user testing sessions, and even hand-drawn wireframes. The more detailed the video, the better Replay can understand the intended behavior.

How accurate is Replay?#

Replay's accuracy depends on the quality of the video and the complexity of the UI. However, our AI engine is constantly learning and improving, and we are committed to providing the most accurate and reliable UI reconstruction tool on the market.

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