Military-grade AES-256 encryption happens entirely in your browser. No uploads, no servers, no tracking. Your files never leave your device.
Maximum 20 files, 200 MB per file • Supports all file types
.nutenc extension.nutenc encrypted filesIf you forget your password, your files cannot be recovered. We do not store passwords, keys, or any file data. This is not a bug — it's a security feature that ensures only you can access your encrypted files.
No. All encryption and decryption happens entirely in your browser using JavaScript and the Web Crypto API. Your files never leave your device, and we never see them.
No. We don't store passwords or encryption keys anywhere. If you forget your password, your encrypted files cannot be recovered. This is by design to ensure maximum security.
Yes, completely free with no limits. We're a privacy-first tool that makes money through other means, not by selling your data or charging for basic security.
It's our custom format that wraps encrypted data with metadata (salt, IV, filename). Files encrypted here can only be decrypted on this page to ensure security and compatibility.
We use AES-256-GCM (Galois/Counter Mode), the same encryption standard used by governments and militaries worldwide. Your password is derived using PBKDF2 with 100,000 iterations.
Yes, up to 200 MB per file. For larger files, consider splitting them or using desktop encryption software. Browser memory limits prevent processing extremely large files.
Yes! After your first visit, the page can work offline. However, encrypted files can always be decrypted even years later using this same page.