Text Encryption & Decryption

Encrypt and decrypt text with AES-256, ROT13, and Caesar cipher. Completely secure, all processing happens in your browser.

Select Encryption Method

⚠️ Save your key! You'll need it to decrypt later.

What is Text Encryption?

Text encryption is the process of converting plain text into unreadable ciphertext using a secret key or algorithm. Our tool supports AES-256 (military-grade encryption), ROT13, Caesar cipher, and Atbash cipher for various security needs.

Why Use Our Text Encryption Tool?

  • Free & Unlimited: Encrypt unlimited text without any restrictions
  • AES-256 Encryption: Military-grade encryption for maximum security
  • Multiple Ciphers: Choose from AES, ROT13, Caesar, and Atbash ciphers
  • Key Generator: Generate strong random keys with one click
  • 100% Secure: All encryption happens in your browser, keys never leave your device

Available Cipher Types

  • AES-256: Advanced Encryption Standard with 256-bit keys. Industry standard for secure data protection. Requires a secret key.
  • ROT13: Simple letter substitution cipher that shifts each letter by 13 positions. Symmetric and reversible.
  • Caesar Cipher: Classic cipher that shifts letters by a specified number of positions. Adjustable shift value.
  • Atbash Cipher: Ancient Hebrew cipher that reverses the alphabet (A↔Z, B↔Y, etc.). Symmetric.

Frequently Asked Questions

What's the difference between encryption and encoding?

Encryption requires a key to decrypt and is meant for security. Encoding (like Base64) is reversible without a key and is for data formatting, not security.

How secure is AES-256?

AES-256 is military-grade encryption used by governments worldwide. With a strong key, it's virtually unbreakable with current technology.

What if I lose my encryption key?

If you lose your AES encryption key, the encrypted data cannot be recovered. Always save your key in a secure location!

When should I use ROT13 vs AES?

Use ROT13 for simple hiding of text (not secure). Use AES-256 for actual security needs like protecting sensitive information.

Is my encryption key stored anywhere?

No! Your encryption key never leaves your browser and is not stored anywhere. Make sure to save it yourself.

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