ROT13 Encoder / Decoder
Hide and reveal text with the classic ROT13 cipher.
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About the ROT13 Encoder / Decoder
ROT13 rotates every letter thirteen places through the alphabet — A becomes N, N becomes A. Because thirteen is half of twenty-six, the same operation encodes and decodes, which made it the spoiler-hiding standard of early internet forums and puzzle communities.
It is obfuscation, not encryption: anyone can reverse it at a glance with the right tool. Use it to keep answers, punchlines and plot twists out of casual view, never to protect secrets.
How to use it
- 1Type or paste any text.
- 2The ROT13 result appears live — apply it again to decode.
- 3Copy the output or download it as a .txt file.
Frequently asked questions
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