AES Encryption/Decryption Tool

Securely encrypt and decrypt text with AES-256 algorithm. Your data never leaves your browser - all processing happens locally for maximum security.

Encrypt Text

Weak

Decrypt Text

About AES Encryption

This free online tool provides secure AES-256 encryption and decryption for your sensitive text data. All processing happens directly in your browser using the Web Crypto API - your data never leaves your device, ensuring maximum privacy and security.

What is AES Encryption?

The Advanced Encryption Standard (AES) is a symmetric encryption algorithm used by governments and security experts worldwide to protect sensitive information. It's considered one of the most secure encryption methods available today.

How to Use This Tool

  1. Encrypt text: Enter your sensitive text and a strong password. Click "Encrypt Text" to generate the encrypted result.
  2. Decrypt text: Paste the encrypted text and enter the same password used for encryption. Click "Decrypt Text" to reveal the original content.
  3. Password security: Always use strong, unique passwords. The strength indicator helps you create better passwords.

Common Use Cases

  • Securely sharing sensitive information via email or messaging
  • Protecting passwords, API keys, and credentials
  • Storing confidential notes or documents
  • Securing personal communications
  • Protecting data before cloud storage

Frequently Asked Questions

Is this tool really secure?

Yes! All encryption/decryption happens locally in your browser using industry-standard AES-256 encryption. Your data never leaves your computer and is never sent to any server.

What happens if I forget my password?

Without the password, your encrypted data cannot be recovered. We do not store passwords or encrypted data, so make sure to remember your password or store it securely.

Can I encrypt large files with this tool?

This tool is designed for text encryption. For large files, consider dedicated file encryption software. Browser-based tools have memory limitations.

Is there a limit to how much text I can encrypt?

There are no artificial limits, but extremely large text may slow down your browser. For best performance, encrypt text under 10MB.

What encryption algorithm is used?

This tool uses AES-256 (Advanced Encryption Standard with 256-bit keys) in CBC mode with PBKDF2 key derivation for maximum security.

Local Processing Only
AES-256 Encryption
No Data Storage