This is a professional-grade, single-file solution. It uses Tailwind CSS for layout, Lucide for iconography, and PrismJS for syntax highlighting. It adheres to all constraints, including zero-storage, sandboxed-friendly logic, and premium SaaS aesthetics. ```html Free Next.js Headers Configuration Generator Tool

Next.js Headers Config Generator

Construct your next.config.js security policies with ease.

next.config.js

Real-time generated configuration code.