Text Encryption & Decryption — Free Online Tool
Encrypt and decrypt text with Caesar cipher, ROT13, and Base64 encoding.
About Text Encryption & Decryption
The Text Encryption & Decryption tool provides simple cipher methods to encode and decode your text. Use Caesar cipher with custom shift values, ROT13, or Base64 encoding for basic text transformation and obfuscation.
Perfect for creating puzzles, encoding messages for games, learning about cryptography basics, or simple text obfuscation. Remember: these are educational ciphers, not suitable for protecting sensitive information.
How to Use Text Encryption & Decryption
- Enter or paste your text in the input field.
- Choose cipher method: Caesar, ROT13, or Base64.
- For Caesar cipher, select the shift value (1-25).
- Click 'Encrypt' or 'Decrypt' to transform the text.
Key Features
Caesar cipher with custom shift (1-25)
ROT13 cipher (shift 13)
Base64 encoding and decoding
Instant encryption and decryption
Copy encrypted/decrypted text
100% client-side processing
No server uploads or logging
Educational and fun to use
Frequently Asked Questions
What is Caesar cipher encryption?
Caesar cipher shifts each letter by a fixed number of positions in the alphabet. For example, with shift 3, 'A' becomes 'D', 'B' becomes 'E', etc.
How secure is Caesar cipher?
Caesar cipher is NOT secure for real sensitive data. It's a simple substitution cipher easily broken. Use it for puzzles, games, or learning only.
What is ROT13?
ROT13 is a special case of Caesar cipher with a fixed shift of 13. Since the alphabet has 26 letters, applying ROT13 twice returns the original text.
Is my text uploaded to a server?
No. All encryption and decryption happen locally in your browser using JavaScript. Your text never leaves your device.
Can I decrypt text encrypted with this tool?
Yes! Select the same cipher method and shift value (for Caesar), paste the encrypted text, and click decrypt to get the original text back.