ROT13 Cipher
Encode and decode text with ROT13, ROT5, ROT47, and Caesar cipher instantly. Real-time conversion β 100% client-side, your data never leaves your browser.
Input Text
Cipher Output
About This Tool
- 100% client-side β your data never leaves your browser
- Real-time encoding and decoding as you type
- Supports ROT13, ROT5, ROT47, and Caesar cipher with custom shift
- Completely free with no registration or limits
Frequently Asked Questions
ROT13 is a simple letter substitution cipher that replaces each letter with the letter 13 positions after it in the alphabet. It is a special case of the Caesar cipher. Since the alphabet has 26 letters, applying ROT13 twice returns the original text.
Yes! ROT13 is its own inverse β encoding and decoding are the same operation. Applying ROT13 to already-encoded text will return the original plaintext. This makes it very convenient to use.
A Caesar cipher is a substitution cipher where each letter is shifted by a fixed number of positions in the alphabet. ROT13 is a Caesar cipher with a shift of 13. Our tool lets you choose any shift from 1 to 25.
Yes, VUREX ROT13 Cipher is completely free with no registration required. Use it as many times as you want with no limits. All processing happens in your browser.