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Caesar Cipher Encrypt/Decrypt

Classic shift cipher tool with encrypt/decrypt and full shift reference.

Input TextTotal 0 · Letters 0 · Non-letters 0
Output ResultTotal 0

Conversion Settings

Shift
Range 0-25, classic Caesar shift is 3
Output Case
Group Output
0 means no grouping

Alphabet Mapping & Shift Reference

Alphabet mapping for current shift
AD
BE
CF
DG
EH
FI
GJ
HK
IL
JM
KN
LO
MP
NQ
OR
PS
QT
RU
SV
TW
UX
VY
WZ
XA
YB
ZC
All shift results (Click to apply)
Result will appear here

About This Tool

Caesar cipher is one of the earliest substitution ciphers, shifting the alphabet by a fixed number. This tool provides encrypt/decrypt modes, 0-25 shift control, case rules, optional punctuation preservation, and grouping output. It also includes full 26-shift results and alphabet mapping for learning and decoding. Everything runs locally for privacy.

Features

  • 🔁 Bidirectional: Toggle between encrypt and decrypt instantly
  • 🎚️ Shift Control: Adjust 0-25 with real-time output
  • 🔤 Case Rules: Preserve, uppercase, or lowercase options
  • 🧩 Non-letter Handling: Keep or ignore spaces and punctuation
  • 🧭 Full Shift Reference: View all 26 shifts for quick decoding
  • 🛡️ Local Processing: Everything runs in your browser for privacy

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