ROT13 Encoder

ROT13 is a simple reversible transformation of Latin letters where each letter is replaced with the letter 13 positions away in the alphabet. For example, A becomes N, and N becomes A again. The tool is useful for spoilers, learning tasks, simple substitution cipher demos, and text experiments. ROT13 works with Latin letters only, preserves letter case, and does not change Cyrillic, digits, spaces, punctuation, or emoji. It is not cryptographic protection and should not be used to store secret data.

• Runs in the browser
• Data is not sent to the server
• Applies ROT13 to Latin letters
• Applying ROT13 again restores the original text
• Preserves letter case
• Does not change Cyrillic, digits, or punctuation
• Useful for spoilers, learning tasks, and text experiments
• No registration required