ShiftyCipher — Caesar Cipher Tool

A simple web-based Caesar cipher tool built with Python and Flask. Supports both encryption and decryption with a custom shift value.

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What is a Caesar Cipher?

A Caesar cipher is one of the oldest encryption techniques. Each letter in the text is shifted by a fixed number of positions in the alphabet. For example, with a shift of 3: A → D, B → E, Z → C.

It's commonly used in CTF challenges and as an introduction to classical cryptography.

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Features

• Encrypt and decrypt text using Caesar cipher
• Custom shift value (0–25)
• Non-alphabetic characters (numbers, symbols, spaces) are preserved
• Copy output with one click
• Input validation and error handling
• Deployable to Vercel

Screenshots

Encrypt Mode

Decrypt Mode

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Setup

git clone https://github.com/heynick1337/ShiftyCipher.git
cd ShiftyCipher
pip install -r requirements.txt
python app.py

Open http://localhost:5000

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Deploy to Vercel

npm i -g vercel
vercel

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Project Structure

ShiftyCipher/
├── app.py              # Flask backend
├── requirements.txt
├── vercel.json         # Vercel deployment config
├── .gitignore
├── README.md
├── screenshots/
│   ├── screenshot1.png
│   └── screenshot2.png
└── templates/
    └── index.html      # Frontend UI

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Author

Nikhil Sahu

• GitHub: github.com/heynick1337
• LinkedIn: linkedin.com/in/sahunikhil01