Caesar Cipher

Caesar Cipher is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is shifted a certain number of places down or up the alphabet.

Input Text ?

Enter or paste the text content you want to encrypt or decrypt using Caesar Cipher.

Shift (Key) ?

Enter the number of positions to shift the letters. This is the encryption key (0-25 for letters).

Mode ?

Choose whether to encrypt or decrypt the text.

Preserve Case ? Preserve Spaces ?

About Caesar Cipher

Caesar Cipher is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is shifted a certain number of places down or up the alphabet.

Features

The Caesar Cipher tool provides the following features:

Encryption and Decryption - Encrypt plaintext or decrypt ciphertext using Caesar Cipher algorithm.
Customizable Shift - Choose any shift value from 0 to 25 to customize your encryption key.
Case Preservation - Option to preserve the original case of letters or convert all to uppercase.
Space and Punctuation Handling - Option to preserve spaces and punctuation marks or process only letters.
Easy to Use - Simple interface for quick encryption and decryption operations.

Examples

Basic Encryption

Input: HELLO WORLD
Shift: 3
Mode: Encrypt

Output: KHOOR ZRUOG

Basic Decryption

Input: KHOOR ZRUOG
Shift: 3
Mode: Decrypt

Output: HELLO WORLD

With Case Preservation

Input: Hello World
Shift: 3
Mode: Encrypt
Preserve Case: ON

Output: Khoor Zruog

With Different Shift

Input: ABC
Shift: 13
Mode: Encrypt

Output: NOP

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