Rail Fence Cipher
Encrypt and decrypt messages using the Rail Fence (zigzag) transposition cipher — choose the number of rails and get the result with working shown.
What Does This Tool Do?
The Rail Fence cipher writes text in a zigzag pattern across a set number of rails, then reads off row by row. A transposition cipher — letters are rearranged rather than substituted.
Key Features
Zigzag Pattern
Writes diagonally across chosen number of rails.
Encrypt & Decrypt
Both directions with the same rail count.
Working Shown
Understand the rail pattern.
Copy Result
One-click copy.
How to Use
- Enter the message to encrypt or decrypt.
- Set the number of rails (default 3).
- Click Encrypt or Decrypt.
Frequently Asked Questions
How does the Rail Fence cipher work?▾
Write the message diagonally across N rails in a zigzag. Then read off each rail left-to-right. Example with 3 rails: "HELLO" → H on rail 0, E on rail 1, L on rail 2, L on rail 1, O on rail 0.
Is it a substitution or transposition cipher?▾
Transposition — the letters stay the same but their positions are rearranged. No letter is replaced by another.
How do I decrypt?▾
Enter the ciphertext, set the same number of rails, and click Decrypt. The tool reconstructs the zigzag positions and reads off the original order.
Complete Guide to Rail Fence Cipher
When To Use This Tool
Use Rail Fence Cipher whenever you need fast, accurate output without installing software. This tool is designed for speed, clarity, and repeatable results for day-to-day work.
Best Practices for Accurate Results
- Double-check the format of your input before running the tool.
- Test with a small sample first, then process larger data.
- Use Related Tools to verify, convert, or transform the output.
Why Users Prefer AdeDX
AdeDX tools are browser-based, free to use, and built to work across desktop and mobile devices. Most processing happens directly in your browser for fast performance and improved privacy.