Most classical ciphers on this site — Caesar, Vigenère, Atbash, XOR — substitute one letter for another. Rail Fence takes a completely different approach: it keeps every original letter exactly as it is and just rearranges their order, writing them in a zigzag across a set number of rows before reading the result back off row by row.
What Is the Rail Fence Cipher Tool?
Enter text and a number of rails, and instantly see the zigzag pattern visualized alongside the resulting ciphertext — or flip to decrypt mode to reverse the process and recover the original message from a rail-fence-encoded ciphertext.
How to Use It
- Open the tool at /tools/rail-fence-cipher.
- Type the text you want to encrypt (or the ciphertext you want to decrypt).
- Set the number of rails to use.
- Click “Encrypt” or “Decrypt”.
- Check the zigzag pattern diagram to see exactly how the letters were arranged.
Key Features
- Visual zigzag diagram showing exactly which rail each letter landed on.
- Configurable rail count from 2 up to 20.
- Full encrypt and decrypt support, verified to round-trip correctly.
- Matches the classic Wikipedia reference example exactly.
When to Use This Tool
- Learning classical transposition ciphers as distinct from substitution ciphers.
- Solving or building a puzzle or escape-room clue using a simple, hand-computable cipher.
- Understanding why transposition ciphers preserve letter frequency while still scrambling the message.
Try It Now
Open Rail Fence Cipher directly, or press ⌘K and type the tool name from anywhere on the site.
Part of the Security & Crypto collection on WebdevToolbox — free, browser-based developer tools with no login required.