Why this tool is useful
Use quoted-printable for mostly readable email bodies and transport fixtures that contain a small number of non-ASCII or reserved bytes.
Text & List Tools · runs locally
Quoted-Printable Text Encoder and Decoder
Encode UTF-8 mail-style text as RFC 2045 quoted-printable or decode validated uppercase escapes and browser-normalized line breaks.
Ready. Your working data stays in this browser.
How it works
Printable ASCII stays visible, unsafe UTF-8 bytes become uppercase hexadecimal pairs and textarea line feeds are treated as browser-normalized RFC line boundaries.
Practical example
café becomes caf=C3=A9 because the accented character occupies the UTF-8 bytes C3 A9.
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.