Encode a simple word
Input
hello
Output
uryyb
Shows the basic ROT13 shift on lowercase Latin letters.
Developer Tools
Review practical ROT13 Encode examples so you can understand expected input, output, and common patterns faster.
Use this ROT13 encoder to shift each Latin letter by 13 positions and produce ROT13-encoded text instantly. It is useful for puzzles, CTF basics, simple obfuscation demos, classroom examples, and understanding classical substitution ciphers. Paste text into the tool and get the transformed output directly in the browser.
Example pages are especially useful for developer tools because they show what good input looks like, what kind of output to expect, and how the tool behaves in common scenarios.
Input
hello
Output
uryyb
Shows the basic ROT13 shift on lowercase Latin letters.
Input
Attack at dawn
Output
Nggnpx ng qnja
Useful for seeing how spaces stay unchanged while letters rotate.
Fix: Remember that ROT13 is only a simple substitution cipher, not real encryption.
Fix: ROT13 only affects A-Z and a-z letters.
Fix: Use ROT13 Decode, even though ROT13 is symmetrical.
Fix: Only letters change. Spaces, punctuation, and digits stay the same.
Fix: Use a real encryption tool like AES for actual secrecy.
After reviewing these examples, run the live tool with your own input. If your task involves a follow-up step, the related page can help you move to the next tool in the workflow.
Open the main ROT13 Encode page and test your own real input.