Zigzag Rail Fence Transposition Cipher
Encode and decode classical zigzag transposition ciphers with wave matrix inspection.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. No data is ever transmitted across the network.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
How to Use Zigzag Rail Fence Transposition Cipher
Select Encrypt or Decrypt mode.
Set the number of rails (depth) using the slider.
View the wave matrix visualization and copy the transposed output.
Frequently Asked Questions
How does the Rail Fence cipher work?
Characters of the message are written downwards and upwards on successive 'rails' of an imaginary fence in a zigzag pattern, then read off in horizontal rows.
Is Rail Fence a substitution or transposition cipher?
It is a transposition cipher—the original characters are preserved without modification, but their positions are permuted.
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