ROT Cipher Encoder Decoder Online

Advanced rotation cipher tool supporting ROT13, Caesar cipher, and custom shifts. Encode and decode text with configurable character sets for cryptography and puzzle solving.

A→NB→OC→P...X→KY→LZ→M

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About ROT-n Ciphers

What is ROT-n?

ROT-n (rotate by n places) is a letter substitution cipher that replaces each letter with the letter n positions after it in the alphabet. ROT13 is the most famous variant, shifting letters by 13 positions.

Popular Variants

  • • ROT13: Most common, shifts by 13
  • • Caesar Cipher: ROT3, used by Julius Caesar
  • • ROT5: For numbers (0-9)
  • • ROT18: Combines ROT13 + ROT5
  • • ROT25: Reverse cipher (ROT1 backwards)
  • • Custom ROT-n: Any shift from 1-25

Common Use Cases

  • • Online forum spoiler protection
  • • Simple text obfuscation
  • • Puzzle and riddle creation
  • • Educational cryptography examples
  • • Quick message encoding
  • • Historical cipher recreation

Features

  • • Real-time encryption/decryption
  • • Configurable character sets
  • • Multiple shift presets
  • • Live alphabet mapping display
  • • File upload and download
  • • Input/output swapping
  • • Copy to clipboard functionality