Free Online AES-256 Encryption Online & Private Text Encrypter

Secure Online AES-256-GCM Encryption: Professional-Grade Data Privacy

When it comes to protecting highly sensitive information, anything less than the best is a liability. Toolnett’s free AES-256-GCM encryption tool provides bank-grade security directly in your web browser. Whether you are a developer securing configuration secrets or a privacy enthusiast protecting a personal message, our utility offers the perfect balance of impenetrable security and 100% privacy.

The Gold Standard: AES-256-GCM Explained

AES (Advanced Encryption Standard) with a 256-bit key is utilized by governments, financial institutions, and security experts globally. We specifically use GCM (Galois/Counter Mode), which provides both:

• Confidentiality: Your data is scrambled into an unreadable cipher that cannot be cracked by modern supercomputers.
• Authenticity: GCM ensures that the encrypted data has not been tampered with. If even one bit of the ciphertext changes, the decryption will fail, alerting you to a potential security breach.

Zero-Knowledge Architecture: 100% Client-Side

Most "secure" online encrypters are traps. When you click "Encrypt," your data and your password are sent to their server to be processed. This means the service provider has the power to read your secrets. Toolnett leverages the Web Crypto API, a native browser standard, to perform all cryptographic operations locally on your device. Your plaintext and your encryption key never touch our servers. It is the ultimate zero-knowledge encryption utility for the web.

Secure Key Derivation with PBKDF2

We don't just use your password directly. Our tool utilizes PBKDF2 (Password-Based Key Derivation Function 2) with a high iteration count (100,000+) and a random salt to transform your password into a cryptographically strong 256-bit key. This protects your data against "rainbow table" and brute-force attacks even if a hacker gets access to the encrypted output.

How to Encrypt Text Safely Online

1. Paste Sensitive Data: Enter the text or JSON you wish to protect.
2. Set Strong Password: Choose a long, complex password. We recommend using our Password Generator.
3. Encrypt Locally: Click the button to generate the secure Base64-encoded ciphertext.
4. Decrypter: To view the data later, simply paste the ciphertext and your password back into the tool.

Take control of your data security with the most trusted and private AES-256 encrypter online.