Text Encryption Tool
Encrypt and decode messages using classic ciphers including Caesar cipher, ROT13, Atbash, Morse code, and binary. Learn cryptography while encoding your messages.
All processing happens in your browser — your text is never sent to any server.
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How to Use
- 1 Enter your message into the text area. Type or paste the text you want to encrypt or decrypt.
- 2 Choose a cipher from the dropdown: Caesar cipher (adjustable shift 1-25), ROT13, Atbash, Morse code, or Binary encoding.
- 3 Set direction - choose Encrypt or Decrypt. Note: ROT13 and Atbash are self-inverting, meaning the same operation encrypts and decrypts.
- 4 Copy the result using the copy button. The quick ciphers panel shows all cipher results simultaneously for easy comparison.
Frequently Asked Questions
What is the Caesar cipher?
The Caesar cipher is one of the oldest encryption methods, named after Julius Caesar. It shifts each letter by a fixed number of positions in the alphabet. With shift 3, A becomes D, B becomes E, etc. It's easy to crack but great for learning cryptography basics.
What does ROT13 mean?
ROT13 ("rotate by 13") is a special Caesar cipher with shift 13. Since the alphabet has 26 letters, applying ROT13 twice returns the original text, making it useful for hiding spoilers or puzzle answers. It's commonly used on forums and in programming.
Is Morse code encryption?
Morse code is an encoding system, not encryption. It converts letters to patterns of dots and dashes for transmission. It's not secure because the conversion is publicly known, but it's historically important for radio and telegraph communication.
Can I use these ciphers for real security?
No, these are educational/fun ciphers easily broken by frequency analysis or brute force. For real security, use modern encryption like AES or RSA. This tool is for learning cryptography concepts and entertainment purposes.
Is my text stored or shared?
No. All encryption and decryption happens entirely in your browser. Your text is never sent to any server, stored, or shared. This tool is 100% private and works offline once loaded.