ROT13 / Caesar Cipher
Apply ROT13 or any Caesar cipher shift (1-25) to encode/decode text. Includes brute-force all 25 shifts, live alphabet mapping and ROT5/ROT18/ROT47 variants.
Caesar Shift
13
Famous shifts:
ROT13 (13)
Caesar (3)
Shift 1
Lucky 7
Shift 19
ROT25
📊 Live Alphabet Mapping (A-Z → shifted)
Input Text
Output
Output will appear here…
13
Current Shift
0
Letters Encoded
0
Total Chars
ROT13
Variant
🔓 Brute Force — All 25 Shifts
Enter text and click “Run Brute Force” to see all possible decryptions…
Quick Examples — Click to Load
🔄 ROT13 Test
🏛️ Caesar Classic
🔐 Hidden Message
🦊 Pangram
💡
ROT13 is self-inverse — applying it twice gives back the original! Used on Usenet to hide spoilers. Use Brute Force to crack unknown Caesar cipher shifts automatically.