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Encodes or decodes text using the ROT13 substitution cipher, which shifts each letter by 13 positions in the alphabet.
About this tool
Encodes or decodes text using the ROT13 substitution cipher, which shifts each letter by 13 positions in the alphabet.
ROT13 Encoder/Decoder is a free text tools tool that runs entirely in your browser — nothing to install, no account to create, and your data never leaves your device. Open the page, add your input, and get a clean, copy-ready result in seconds.
Open ROT13 Encoder/Decoder on AltFTool — it loads instantly in your browser.
Paste your code or data sample into the workspace.
Pick the format, conversion, or analysis you need.
Copy the polished result straight back into your project.
Paste snippets, payloads, or commands straight from your editor and get a tidy, shareable result in one step.
Format, convert, or inspect data before it lands in tests, documentation, or production requests.
Use the generated output as a copy-ready starting point instead of writing everything by hand.
Yes — ROT13 Encoder/Decoder is completely free on AltFTool, with no signup, no trial limits, and no hidden costs.
Yes. ROT13 Encoder/Decoder runs in your browser, so what you enter or upload stays on your device instead of being sent to a server.
Encodes or decodes text using the ROT13 substitution cipher, which shifts each letter by 13 positions in the alphabet. It's built for quick, everyday text tools tasks with results you can copy or download straight away.
Yes — ROT13 Encoder/Decoder works in any modern browser, on desktop, tablet, and mobile, with the same features everywhere.