Shift letters, apply ROT13, and compare every alphabet shift as a learning aid.
CLASSICAL CIPHER LAB · 26 KEYS
Shift it. Then break it.
A Caesar shift keeps the shape of every word. Use the key wheel, ROT13 shortcut, or let letter frequency make a guess.
A↻D
Not encryption.There are only 25 useful keys. This page displays every one; never use a Caesar cipher to protect private information.
01 / MESSAGE35 letters
02 / SHIFT KEYForward
AFLRX
03places
03 / RESULT
Shift 3
FREQUENCY ANALYSIS
Where does your text peak?
Likely shift: 0 · low confidence
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Typical EnglishYour text
No shift stands out strongly; compare the full key list before choosing.
THE FULL KEYSPACE
All 26 possible shifts
Tap any row to inspect it
Frequency analysis is only a heuristic: short text, names, and non-English writing can mislead it. Caesar and ROT13 are for puzzles and spoiler hiding, never confidentiality.
