Why this tool is useful
Use ROT47 for reversible test fixtures, puzzle text and demonstrations that need punctuation and digits transformed as well as letters.
Text & List Tools · runs locally
ROT47 Text Transformer
Apply the reversible ROT47 substitution to printable ASCII while leaving spaces and Unicode characters unchanged.
Ready. Your working data stays in this browser.
How it works
Every ASCII code point from 33 through 126 is rotated by 47 positions; applying the same operation twice restores the original text.
Practical example
Hello! transforms to w6==@P and a second run returns Hello!.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.