French Baguette Tools
ROT13
Shifts every letter by 13 positions : applying the tool twice in a row always restores the original text.
ROT13 is a free tool that runs entirely in your browser, with no data ever sent to a server. Shift every letter by 13 positions, reversible by applying it twice.
Why 13 specifically
The Latin alphabet has 26 letters : 13 is exactly half. Shifting twice by 13 positions therefore equals a shift of 26, a full loop that brings every letter back to its original spot. That's what makes ROT13 self-reversing, with no separate "decode" button needed.
What this tool does not do
This tool only applies the transformation described above, with no spelling correction and no understanding of the text's meaning. A text of tens of thousands of lines is processed instantly ; beyond that, the only limit is your device's memory.
Frequently asked questions
Does ROT13 actually protect a message?
No : anyone who knows the principle can decode it in their head. For real confidentiality needs, use a modern encryption tool.
Is my data sent to a server?
No : the text you type or paste is processed entirely in your browser, on your device. It is never transmitted to a server.
Do I need to create an account or install anything?
No : the tool works directly on this page, with no sign-up and no install.
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