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ChatGPT HTML Web View

ChatGPT HTML Web View

ChatGPT Browser Extension

Tech Stack

  • JavaScript
  • HTML
  • CSS

Project Info

  • developer-tools

Tags

  • developer-tools
  • chatgpt
  • browser-extension
  • html
  • preview
  • productivity
  • code-rendering

ChatGPT HTML Web View

I use ChatGPT a lot for HTML, and I got tired of copying code into separate files just to see how it renders.

How It Works

The extension adds a “Preview” button in the ChatGPT interface whenever it detects HTML. One click and you can:

  1. See the rendered HTML in a popup window
  2. Test JavaScript functionality
  3. View CSS styling as intended
  4. Make quick edits and see changes in real-time

The preview updates automatically as the code changes in ChatGPT, so no more copy-paste-refresh cycles.

Development

Built with vanilla JavaScript to keep it small. The tricky part was parsing and sanitizing HTML from ChatGPT’s responses without breaking functionality — it detects code blocks, validates the HTML, and renders it in a sandboxed iframe.

Also has CodePen export and an adjustable preview window.

Installation

Available for Chrome and Firefox:

  • Chrome: Install from the Chrome Web Store
  • Firefox: Available in the Firefox Add-ons repository

After installing, just open ChatGPT and start writing HTML. The preview button shows up automatically.

Hundreds of installs on both Chrome and Firefox.