What are ROT ciphers?

ROT ciphers rotate characters through a fixed alphabet, shifting each symbol by a specific offset. Variants such as ROT13, ROT5, ROT18, and ROT47 target different character sets-letters, digits, or the full ASCII range-so the same idea can obfuscate many kinds of text. Because the transformation is its own inverse, applying the same rotation twice restores the message, making ROT ciphers handy for quick, reversible scrambling even though they offer no real security.

Tool description

Switch between ROT variants and instantly encode or decode text using the caesar-salad library. Each option keeps untouched characters that fall outside its rotation range, preserving readability where possible.

Features

  • Dropdown selector for ROT5, ROT13, ROT18, and ROT47 variants
  • Immediate encryption and decryption with a single click thanks to caesar-salad
  • Preserves characters outside the active rotation set for predictable results
  • Handles mixed-case letters, digits, and punctuation depending on the chosen variant

Use Cases

  • Demonstrating fixed rotations and involution properties in crypto lessons
  • Solving or creating classic ROT13-based puzzles and word games
  • Lightly obfuscating spoilers, punchlines, or sample data before sharing
  • Testing how different ROT variants treat letters, numbers, and punctuation