AES Encryption Tool

Military-grade AES-256-GCM encryption and decryption. All processing happens locally in your browser for maximum security.

Select Operation

Encrypt
Convert plain text to encrypted text
Decrypt
Convert encrypted text back to plain text
0 characters | Maximum: 10,000
Use a strong password with at least 8 characters (letters, numbers, symbols)

Security Information

  • All encryption/decryption happens locally in your browser
  • No data is sent to any server
  • Uses AES-256-GCM (military-grade encryption)
  • Each encryption generates a unique result
  • Your secret key is never stored or transmitted

Advanced Options

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Ready for encryption

AES Encryption Tool - Military-Grade Online Encryption

Our free AES Encryption Tool provides military-grade AES-256-GCM encryption and decryption completely in your browser. Encrypt sensitive text, messages, or data with confidence using one of the world's most secure encryption algorithms.

What is AES Encryption?

AES (Advanced Encryption Standard) is a symmetric encryption algorithm established by the U.S. National Institute of Standards and Technology (NIST) in 2001. It's widely considered one of the most secure encryption standards available and is used by governments, military organizations, and security-conscious companies worldwide.

Key Features of Our AES Encryption Tool

How AES Encryption Works

  1. Your password is strengthened using PBKDF2 key derivation function
  2. A random Initialization Vector (IV) is generated for each encryption
  3. The AES-256-GCM algorithm encrypts your text using the derived key
  4. Authentication tag is generated to ensure data integrity
  5. Result is encoded in your chosen format (Base64 or Hex)
  6. For decryption, the process is reversed using the same password

Frequently Asked Questions

Is this tool really secure?

Yes! The tool uses Web Crypto API which is built into modern browsers and implements genuine AES-256-GCM encryption. All processing happens locally in your browser - no data is sent to any server. Your secret key never leaves your device.

What's the difference between AES-256 and AES-128?

AES-256 uses a 256-bit key while AES-128 uses a 128-bit key. AES-256 provides a higher security margin and is recommended for protecting highly sensitive data. Both are secure, but AES-256 is considered more future-proof against potential advances in computing power.

Can I encrypt files with this tool?

Currently, this tool is designed for text encryption. For file encryption, we recommend using dedicated file encryption software. However, you can encrypt the contents of text-based files by copying and pasting the text into the tool.

What happens if I lose my password?

Without the password, your encrypted data cannot be decrypted. AES encryption is designed to be secure even against brute-force attacks. Always store your password securely and consider keeping backups in multiple secure locations.

Why does the same text encrypt differently each time?

This is a security feature! Each encryption generates a new random Initialization Vector (IV), which ensures that even identical plaintexts produce different ciphertexts. This prevents attackers from identifying patterns in your encrypted data.

What is GCM mode in AES-GCM?

GCM (Galois/Counter Mode) provides both confidentiality (encryption) and authenticity (integrity checking). It generates an authentication tag that allows the receiver to verify that the ciphertext hasn't been tampered with during transmission.