Privacy-first cloud storage

Secure storage with a modern zero-knowledge core.

Encrypt on your device. Control your keys. Keep your files private by default across web and mobile.

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100% Client-Side

All encryption and decryption stays on your device.

Zero-Knowledge

Servers store encrypted blobs, never plaintext.

Recovery Ready

12-word phrase flow for safe account recovery.

Vault experience

Interactive privacy, clearer at a glance.

Visual signals help users understand what is protected, what stays local, and why the recovery phrase matters.

Secure server infrastructure
Encrypted infrastructure
Security dashboard on a laptop
Device-side protection
Person working with a secure cloud application
Private cloud access

Important Account Warning

Do not lose recovery access

If you lose both your 12-word recovery phrase and your active trusted device, your account may become permanently unrecoverable. In that case, support cannot restore access to your encrypted vault.

Use a trusted device

For sign-up and recovery, use a trusted app environment and keep at least one active trusted device available whenever possible.

Back up your phrase offline

Store your recovery phrase in a secure offline location. This phrase is required to restore access if your device is lost, reset, or replaced.

How Secret Box Works

1. Create account

Sign up by email/password or wallet, then save your recovery phrase offline.

2. Upload files

Files encrypt in-browser before upload so data stays private in transit and at rest.

3. Access anywhere

Open, rename, delete, and download files with secure local decryption.

4. Recover safely

If access is lost, use your 12-word phrase with a protected recovery flow.