Text Encryption Tool

Encrypt and decrypt text securely using AES and Caesar cipher algorithms. All processing happens in your browser - no data is sent to servers.

Input Text

Encryption Settings

Password Strength: None

Encryption Results

Ready for Encryption/Decryption

Enter your text in the left panel, configure settings, and click Encrypt or Decrypt

Try the "Load Example" button for sample text

Encryption Algorithms Explained

AES-256 (Advanced Encryption Standard)

AES-256 is a symmetric encryption algorithm that uses a 256-bit key to encrypt and decrypt data. It's widely considered one of the most secure encryption standards available today.

Key features:

  • 256-bit key size - Extremely secure against brute force attacks
  • Symmetric encryption - Same key is used for encryption and decryption
  • Block cipher - Encrypts data in fixed-size blocks (128 bits)
  • Used worldwide - Adopted by governments, banks, and security experts

Our implementation uses a password-based key derivation function (PBKDF2) to generate a secure 256-bit key from your password.

Caesar Cipher

The Caesar Cipher is one of the simplest and oldest encryption techniques, used by Julius Caesar to protect military messages.

How it works:

  • Each letter in the plaintext is shifted a fixed number of positions down the alphabet
  • For example, with a shift of 3: A → D, B → E, C → F, etc.
  • Letters wrap around the alphabet: Z → C (with shift 3)
  • Non-alphabetic characters remain unchanged

While not secure by modern standards, it's excellent for learning about encryption basics and for simple obfuscation.

XOR Cipher

The XOR Cipher is a basic encryption algorithm that uses the exclusive OR (XOR) logical operation.

How it works:

  • Each character in the text is combined with a corresponding character from the key using XOR operation
  • The same key is used for both encryption and decryption
  • If the key is shorter than the text, it's repeated to match the length
  • Applying XOR twice with the same key returns the original text

While simple, XOR cipher can be secure if the key is truly random and as long as the message (one-time pad).

Algorithm Comparison

Algorithm Security Level Speed Best Use Case
AES-256 Very High Fast Sensitive data, passwords, confidential information
Caesar Cipher Low Very Fast Educational purposes, simple obfuscation
XOR Cipher Medium (with strong key) Fast Basic encryption, learning cryptography

Text Encryption Features

Client-Side Encryption

All encryption/decryption happens in your browser. Your data never leaves your computer.

Multiple Algorithms

Choose from AES-256 (military-grade), Caesar cipher, and XOR cipher for different security needs.

Password Protection

Secure your encrypted text with strong passwords. Password strength indicator included.

Fast Processing

Encrypt or decrypt text instantly with our optimized JavaScript implementation.

Dark Mode

Work comfortably with our dark mode feature that's easy on the eyes.

Mobile Friendly

Fully responsive design that works perfectly on phones, tablets, and desktops.