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Cipher Decoder

CTF classical cipher solver. Auto-detect cipher type via frequency analysis, then brute-force Caesar/ROT, solve Vigenère, Atbash, Rail Fence, Bacon, Morse, A1Z26, and single-byte XOR — all in your browser.

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Cipher DecoderCTF

Ciphertext Input0 chars · 0 bytes

Paste ciphertext above and click Auto-Detect to run frequency analysis.