Demo working preview

🧠 Building an AI-Powered Web Code Editor from a Screenshot or Prompt

Using Multimodal LLMs, Monaco Editor, and Real-Time Code Generation

Turning ideas into working web code has always felt a bit clunky to me — so I decided to build something fun: an AI-powered web code editor you can run right in the browser.

You can start with a blank canvas, upload a screenshot of a website you like, or just type a prompt. Then the AI takes over.

I used LLaMA-4 Maverick to convert screenshots into code, and GPT-4o to handle prompts and assist with edits. It’s all about making web development feel smooth, creative, and kinda magical — even if you're just experimenting on a weekend. Turn screenshots into HTML/CSS/JS, help you edit live code with context-aware chat, and even preview your changes in real-time.

🔗 Project Links

⚙️ Tech Stack

Here's a peek into the technologies powering this AI-first editor:

🧠 AI Models

LLaMA-4 Maverick — Multimodal model for screenshot-to-code
GPT-4o — Prompt-based code generation and context-aware chat

🧰 Frameworks & SDKs

Next.js — React-based frontend framework
Vercel AI SDK — Real-time streaming of AI responses
Mastra AI — AI orchestration and agent management
Netlify API - Instant deployment of the website

💻 Code & UI

Monaco Editor — The same editor behind VS Code
Iframe — Live rendering of HTML/CSS/JS output
Console Interceptor — Integrated debugging console

☁️ Storage

Amazon S3 — For image uploads and access

Let’s dive into how it works 👇

🛠️ How It Works

1. 🚀 Getting Started

You can begin your coding journey in one of three ways:

Start with an empty template
Upload a screenshot of a website
Upload an image and generate render code

Once you provide an input, the editor spins into action — powered by LLaMA-4 Maverick (for screenshots) or GPT-4o (for prompts) — and generates clean, semantic HTML, CSS, and JavaScript.

2. 🧠 Screenshot-to-Code with LLaMA-4 Maverick

When a screenshot is uploaded, we use LLaMA-4 Maverick, a multimodal model capable of visually understanding and interpreting layout, components, and design cues. It produces:

The full HTML structure
Relevant styling (CSS)
Any interactive behaviors (JavaScript)

This is especially useful when replicating existing website designs or UI inspiration from dribbble/Behance mockups.

3. 🧑‍💻 Code Editing with Monaco + Live Preview

The generated code is loaded into a Monaco Editor (the same code engine behind VS Code). This gives you:

IntelliSense
Syntax highlighting
Autocompletion

As you modify the code, the output is rendered live in an iframe-based preview window, allowing for immediate visual feedback.

4. 🪵 Console Window: See Logs in Action

To make debugging seamless, we built a console window that captures:

console.log() output
Warnings
Errors

Everything you’d see in a typical browser dev console, now integrated right into your workspace.

5. 🤖 Context-Aware AI Chat Assistant

Just like GitHub Copilot or Cursor, users can:

Select a portion of the code
Ask a question or give an instruction

The AI assistant (GPT-4o) understands the selected context and responds with accurate suggestions or code snippets. The output can be directly injected into the editor — no manual copy-pasting required.

And thanks to the Vercel AI SDK, the responses are streamed in real-time, making the experience feel incredibly responsive.

6. 🖼️ Upload and Use Images Easily

Users can upload custom images, which are stored securely on Amazon S3. From the image window, they can:

Preview uploaded images
Copy pre-generated HTML code to embed those images
Paste directly into the HTML editor

Perfect for designing web pages that include assets like icons, logos, or product images.

7. 🌐 One-Click Deploy with Netlify

Once your website looks good in the preview, you can hit a "Deploy" button — and boom 💥 — it's live!

I hooked it up with the Netlify API, so with a single click, your project gets deployed and you instantly get a shareable live link. No need to fiddle with configs or hosting — it’s just part of the fun.

Perfect for showing off to friends, testing something real quick, or sharing a prototype with someone.

✨ Wrapping Up

This editor brings together the best of AI, developer UX, and modern web tooling — letting creators and devs go from idea → screenshot → working website in minutes.

No extensions, no heavy IDEs. Just pure AI magic in your browser.