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A→B, B→C, C→D, ... Z→A
Classic Caesar cipherA→C, B→D, C→E, ... Z→B
Double shiftA→D, B→E, C→F, ... Z→C
Triple shiftA→E, B→F, C→G, ... Z→D
Quadruple shiftA→F, B→G, C→H, ... Z→E
Quintuple shiftA→G, B→H, C→I, ... Z→F
Sextuple shiftA→H, B→I, C→J, ... Z→G
Septuple shiftA→I, B→J, C→K, ... Z→H
Octuple shiftA→J, B→K, C→L, ... Z→I
Nonuple shiftA→K, B→L, C→M, ... Z→J
Decuple shiftA→L, B→M, C→N, ... Z→K
Undecuple shiftA→M, B→N, C→O, ... Z→L
Duodecuple shiftA→N, B→O, C→P, ... Z→M
Self-reversible cipherA→O, B→P, C→Q, ... Z→N
Quattuordecuple shiftA→P, B→Q, C→R, ... Z→O
Quindecuple shiftA→Q, B→R, C→S, ... Z→P
Sedecuple shiftA→R, B→S, C→T, ... Z→Q
Septendecuple shiftA→S, B→T, C→U, ... Z→R
Octodecuple shiftA→T, B→U, C→V, ... Z→S
Novemdecuple shiftA→U, B→V, C→W, ... Z→T
Vigintuple shiftA→V, B→W, C→X, ... Z→U
Unvigintuple shiftA→W, B→X, C→Y, ... Z→V
Duovigintuple shiftA→X, B→Y, C→Z, ... Z→W
Trevigintuple shiftA→Y, B→Z, C→A, ... Z→X
Quattuorvigintuple shiftA→Z, B→A, C→B, ... Z→Y
Quinvigintuple shiftAll your data processing happens locally in your browser. Your information never leaves your device, ensuring complete privacy and security.
Caesar Cipher Decoder makes it easy to decrypt messages by letting you choose a custom shift value or automatically detecting it for you. Auto Detecting Shift value saves lot of time and make it accurate to get the decoded value.
Whether you’re solving a puzzle, studying basic cryptography, or just curious about encoded text, our tool provide you with multiple ways to crack the code — from manual shift testing to frequency analysis and brute-force decoding
Enter the Encrypted Text and Select the shift value and see the decoded results.
Encrypted text: WKLV LV D WHVW
Decoded with shift 3: THIS IS A TEST
Automatically detect the most likely shift value using frequency analysis and common word patterns. Makes decoding much easier and faster.
Choose from 25 different shift values or enter a custom value. Special support for ROT13 (shift 13) which is self-reversible.
Keep original letter case (uppercase/lowercase) and preserve spaces, numbers, and special characters unchanged during decoding.
Analyze letter frequency patterns to help identify the most likely shift value. Shows detailed statistics and suggestions.
This feature provides instant feedback which makes it quicker to get results and test different shift values. It's on by default.
Try all 25 possible shift values at once to see which one produces readable text. Perfect for when you don't know the shift value.