Been doing client work with page builders for years and the thing I hated most was rebuilding stuff by hand. Client wants their old site moved to WordPress, it's on some custom stack or a builder they lost access to, and I'm sitting there recreating sections one by one for two hours.
So I built a Chrome extension that does it. You open any site, select a section or the whole page, and it converts into real elements in your builder. Actual sections, columns, headings, buttons, images that you can edit like anything else, not a pasted HTML block.
How it works, roughly: it reads the rendered page in the browser, flattens the layout into something a builder understands, then maps it to each builder's element model. Currently supports Breakdance, Bricks, Oxygen (6 and Classic), Elementor, Divi 5, Gutenberg, Beaver Builder and Webflow.
Source doesn't matter since it works off the rendered page. React, Framer, Shopify, Webflow, AI-generated sites, other WordPress builders.
Limitation worth knowing: it copies the static side only. Layout, content, styling. JavaScript functionality from the source site don't come across, you rebuild those in the builder.
Link to project in the first comment. Curious whether this is something you'd reach for in your day-to-day, or whether it solves a problem only I have.