pagevault: Hiding an Encryption Platform Inside HTML

HTML is an encryption container format. That sounds wrong, but think about what an HTML file can hold: arbitrary data in script tags or data attributes, a full programming runtime via JavaScript, and a rendering engine (the browser) on every device on the planet. If you embed encrypted data and the code to decrypt it, the result is a file that looks inert until someone types the right password. pagevault takes this idea seriously. It encrypts files, documents, images, entire websites, into self-contained HTML pages that decrypt in the browser. No backend. No JavaScript crypto libraries. The browser already has AES-256-GCM built in via the Web Crypto API. pagevault just has to match the parameters exactly on the Python side and embed the right 200 lines of JavaScript. The output is a single .html file. You can email it, put it on a USB stick, host it on GitHub Pages, or double-click it on your desktop. It doesn't phone home, it doesn't load CDNs, it doesn't need anything except a browse