ROT13 Encoder
ROT13 encoder and decoder that shifts each letter 13 places in the alphabet, so the same operation encodes and decodes your text. This classic Caesar cipher runs instantly in your browser, for free.
ROT13 is its own inverse. Applying it twice returns the original.
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What is ROT13 Encoder?
ROT13 encoder and decoder that shifts each letter 13 places in the alphabet, so the same operation encodes and decodes your text. This classic Caesar cipher runs instantly in your browser, for free.
How to Use
- 1Enter Input— Enter the text you want to encode/decode.
- 2View Result— Check the ROT13-encoded result.
- 3Copy— Copy the result to use it.
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Frequently Asked Questions
ROT13 is a simple letter substitution cipher that replaces each letter with the letter 13 positions after it in the alphabet. Applying it twice returns the original text.
Yes, it is completely free.
No. All processing is done in the browser.
Yes, it is responsive and works on mobile devices.
Yes, it is based on static data and can be used offline.