Text Encryptor / Decryptor
Encrypt and decrypt text using Caesar cipher (custom shift), ROT13, or Base64.
How to use this tool
- 1Click Caesar Cipher, ROT13, or Base64 to choose the method.
- 2For Caesar Cipher, drag the Shift slider (1-25) to set the shift amount.
- 3Click Encrypt or Decrypt to set the direction.
- 4Paste text into the Input panel — the output appears instantly. Click Copy to copy it.
About Text Encryptor / Decryptor
Learning about classical ciphers or need a simple obfuscation method for non-sensitive text? This tool implements three methods. Caesar cipher shifts each letter by a custom amount (1-25) set with a slider — encrypting with shift 3 turns 'A' into 'D'; decrypting reverses the shift. ROT13 is a fixed Caesar cipher with shift 13, its own inverse (applying ROT13 twice returns the original), commonly used to hide spoilers in online forums. Base64 encodes text to Base64 using btoa() with UTF-8 pre-encoding, and decodes using atob() — the same method as the dedicated Base64 tool. Encrypt and Decrypt toggle buttons control the direction. Non-alphabetic characters (numbers, punctuation, spaces) pass through unchanged in Caesar and ROT13. These are educational and obfuscation tools only — none of them provide cryptographic security. For secure encryption, use AES or similar algorithms.