Tool to decrypt/encrypt by ROT. The code ROT for Rotation (which most common variant is Caesar Cipher) is the easiest shift-based encryption cipher.
ROT Cipher - dCode
Tag(s) : Substitution Cipher
dCode is free and its tools are a valuable help in games, maths, geocaching, puzzles and problems to solve every day!
A suggestion ? a feedback ? a bug ? an idea ? Write to dCode!
ROT Cipher
ROT Cipher Decoder
ROT-n Encoder
Tool to decrypt/encrypt by ROT. The code ROT for Rotation (which most common variant is Caesar Cipher) is the easiest shift-based encryption cipher.
Answers to Questions
How to encrypt using Rot cipher?
Rot-N/Rot cipher is a simple character substitution based on a shift (or rotation) of an alphabet. E.g. one letter is replaced by another (always the same) that is located further in the alphabet.
This is the basis of the famous Caesar code and its many variants modifying the shift. The most popular variant is the ROT13 which has the advantage of being reversible with a 26 letter alphabet (the encryption or decryption operations are identical because 13 is half of 26).
| Plain Alphabet | ABCDEFGHIJKLMNOPQRSTUVWXYZ |
| Cipher Alphabet Shift/Rotation of 1 | BCDEFGHIJKLMNOPQRSTUVWXYZA |
| Cipher Alphabet Shift/Rotation of 2 | CDEFGHIJKLMNOPQRSTUVWXYZAB |
| ... | ... |
| Cipher Alphabet Shift/Rotation of 13 | NOPQRSTUVWXYZABCDEFGHIJKLM |
| ... | ... |
Example: The message ROTATION coded on the alphabet ABCDEFGHIJKLMNOPQRSTUVWXYZ with an offset of N=13, gives the encrypted message EBGNGVBA.
How to decrypt Rot cipher?
Deciphering Rot is very similar (or sometimes identical) to encryption, with a shift of the alphabet in the other direction.
What are rot variants?
A variant of Rot consists of modifying the alphabet used, which may be different from the 26 characters (A to Z).
Any shift can be considered:
| Shift | Name | Remarks |
|---|---|---|
| 1 | Rot1/Rot-1 | Minimal shift of 1 letter |
| 2 | Rot2/Rot-2 | |
| 3 | Rot3/Rot-3 | Caesar Cipher (default usual shift) |
| 4 | Rot4/Rot-4 | |
| 5 | Rot5/Rot-5 | Reversible for the 10 digits |
| 6 | Rot6/Rot-6 | |
| 7 | Rot7/Rot-7 | |
| 8 | Rot8/Rot-8 | |
| 9 | Rot9/Rot-9 | |
| 10 | Rot10/Rot-10 | |
| 11 | Rot11/Rot-11 | |
| 12 | Rot12/Rot-12 | |
| 13 | Rot13/Rot-13 | Reversible for our 26-letter alphabet |
| 14 | Rot14/Rot-14 | |
| 15 | Rot15/Rot-15 | |
| 16 | Rot16/Rot-16 | Reversible for base32 encoding |
| 17 | Rot17/Rot-17 | |
| 18 | Rot18/Rot-18 | Reversible for an alphanumeric alphabet of 36 characters (26 letters + 10 digits) |
| 19 | Rot19/Rot-19 | |
| 20 | Rot20/Rot-20 | |
| 21 | Rot21/Rot-21 | |
| 22 | Rot22/Rot-22 | |
| 23 | Rot23/Rot-23 | |
| 24 | Rot24/Rot-24 | |
| 25 | Rot25/Rot-25 | |
| 26 | Rot26/Rot-26 | Identity transformation (no change) for our 26-letter alphabet |
| 31 | Rot31/Rot-31 | Reversible for an case-sentitive alphanumeric 62-chars alphabet (26 uppercase + 26 lowercase + 10 digits) |
| 32 | Rot32/Rot-32 | Reversible for base64 encoding |
| 47 | Rot47/Rot-47 | Reversible for the 94 ASCII printable characters |
Source code
dCode retains ownership of the source code of the script ROT Cipher online. Except explicit open source licence (indicated Creative Commons / free), any algorithm, applet, snippet, software (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt, encrypt, decipher, cipher, decode, code, translate) written in any informatic langauge (PHP, Java, C#, Python, Javascript, Matlab, etc.) which dCode owns rights will not be released for free. To download the online ROT Cipher script for offline use on PC, iPhone or Android, ask for price quote on contact page !
Questions / Comments
Version Française
or 
