Drag-and-Drop File Encryptor

The fastest way to encrypt a file online without actually sending it anywhere: drop in any file, set a password, and get back an encrypted copy that's safe to email or hand off — decrypt it the same way, with the same password. Encryption uses the browser's own built-in AES-256-GCM cipher, with your password stretched through 600,000 rounds of PBKDF2 before it ever touches the actual encryption key. This is one static HTML file with no server, no account, and no network requests of any kind — verify that yourself by reading the page's own source, or just by opening it with your Wi-Fi off. One-time purchase, works offline forever.