Quoted-printable is a text encoding, used for converting text content to printable ASCII. The encoding is primarily used for transferring text in email messages, as mandated by the MIME standard.
The online quoted-printable encoder tool first encodes the input text in either UTF-8 or ISO-8859-1. The characters are then output according to this schema:
| Character | Result | Comment |
|---|---|---|
| "=" (0x3D) | =3D | Special handling of the equal sign |
| " " (0x20) to "~" (0x7E) | Unmodified | Printable ASCII (7 bits) |
| Any other | =XX | Hexadecimal char code |
Since quoted-printable does not in itself specify the text character encoding, it is important to specify this correctly when used. The online quoted-printable decoder tool attempts to auto-detect the text encoding.
See the Wikipedia article on quoted-printable for more info.