Generating self-Contained HTML Snapshots Without Puppeteer

The Problem I needed to preserve a webpage exactly as it appears (layout, styles, images, and all) in a format that stayed responsive across device sizes. That last part was the dealbreaker. Screenshots and PDFs are static, fixed-dimension artifacts. They don't reflow. On a phone, you're pinch-zooming into a blurry mess. On a tablet, the layout doesn't adapt. For our use case, the snapshot had to behave like a real web page: fluid, responsive, and readable on any screen. That immediately ruled out the screenshot/PDF route. Services like ResPack, Browserless.io, and Cloudflare's browser rendering API are built around producing flat outputs. Puppeteer itself can capture HTML via page.content() , but it gives you a raw DOM with the same broken external dependencies and missing CSSOM styles. None of these tools solve the real problem: producing a single self-contained file that actually renders correctly on its own. So I went down a different path: capturing the actual DOM and inlining eve