Show HN: Visual drag-and-drop README builder with live GitHub preview

I built this because I kept wasting time on README formatting -- badge URLs, table alignment, pushing just to check rendering.

It's a client-side React app. You drag blocks (headings, badges, code, tables, images, alerts) into a canvas and see exactly how GitHub will render them. When it looks right, copy or export.

No backend, no login. Source: https://github.com/ofershap/readme-builder