Advanced Client-Side File Encryptor – Free Online Tool | ToolCookie
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Secure File Encryption Made Simple

Military-grade AES-256-GCM encryption with zero data transmission. Your files never leave your browser – complete privacy with enterprise-level security.

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Advanced Client-Side File Encryptor

Client-Side Only
AES-256-GCM Active
Memory: Secure
🛡️

Drop Files to Encrypt

Your files never leave this browser – complete privacy guaranteed

Password Protection

Enter password to check strength

Batch Options

Why Use Our File Encryptor

How It Works

Frequently Asked Questions

How secure is the encryption used? +

We use AES-256-GCM encryption, the same standard used by governments and military organizations. With PBKDF2 key derivation using 600,000 rounds, it would take billions of years to crack with current technology.

Are my files sent to your servers? +

Absolutely not. All encryption happens entirely in your browser using client-side JavaScript. Your files and passwords never leave your device or get transmitted anywhere.

Can I decrypt files on other devices? +

Yes! Encrypted files can be decrypted on any device with a modern web browser using this same tool. Just upload the encrypted file and enter your password.

What happens if I forget my password? +

Due to the strong encryption used, there is no way to recover files without the password. This is by design for maximum security. Always keep your passwords in a secure location.