Quoted-Printable Encode / Decode

Quoted-Printable Encoding and Decoding Tool

Encode text to Quoted-Printable or decode it back, following the MIME rules from RFC 2045.

About Quoted-Printable

Quoted-Printable is a content transfer encoding defined in RFC 2045 for sending data that is mostly printable ASCII text through channels, such as older email systems, that are only safe for 7-bit characters. Printable ASCII characters are left as-is so the message stays human-readable, while bytes that are unsafe (control characters, non-ASCII bytes, and the = sign itself) are written as = followed by two uppercase hexadecimal digits, for example =C3=A9 for the UTF-8 encoding of é.

To respect the line-length limits of email, Quoted-Printable inserts soft line breaks: a trailing = at the end of a line means the line continues and the break should be removed when decoding. This keeps every encoded line at 76 characters or fewer. Quoted-Printable is the encoding behind the Content-Transfer-Encoding: quoted-printable header you will see in raw email source, and it is most efficient for text that is predominantly ASCII with only occasional special characters.