Sealed, a file-sharing link with the key hidden in the URL fragment

Field notes

Sealed encrypts files in the browser before upload and places the decryption secret after the URL’s # fragment. The interface accepts folders and text, combines multiple files into a ZIP, and offers expiry periods from five minutes to thirty days plus download caps from one to one hundred. Its stated privacy model limits the server to ciphertext and delivery metadata, while a password adds a PBKDF2-derived proof and twenty-failure destruction rule.