Caesar Cipher
13 (ROT13)
Input Text
Output
How It Works
- Enter or paste your text in the input area
- Select the shift value (1-25) for the Caesar cipher
- Click "Encrypt" to encode or "Decrypt" to decode
- Use "Auto-Decrypt" to try all 25 possible shifts
- Copy the result or use it as new input
Frequently Asked Questions
What is a Caesar Cipher?
The Caesar Cipher is one of the simplest encryption techniques, named after Julius Caesar who used it for secret communication. Each letter in the plaintext is shifted a certain number of places down the alphabet.
Is this tool free?
Yes, ApexSofteck Tools's Caesar Cipher is completely free. Encrypt and decrypt unlimited messages without any registration required.
How secure is the Caesar Cipher?
The Caesar Cipher is not secure by modern standards. With only 25 possible shifts, it can be easily broken by brute force. It's mainly used for educational purposes, puzzles, or as a simple obfuscation technique.
What is auto-decrypt?
Auto-decrypt tries all 25 possible shift values and shows you all results. This is useful if you don't know the shift value used to encrypt the message.
Is my text secure?
Yes. All processing happens in your browser. Your messages are never sent to any server or stored anywhere.