Why does the email contain = signs everywhere?

Quoted-printable escapes any byte outside the printable ASCII range as =XX, and marks lines it had to wrap with a trailing =. A literal equals sign in the original text is encoded as =3D so it can't be confused with an escape.

What is the difference from Base64 in email?

Both are MIME content-transfer encodings. Base64 is used for binary attachments and makes the payload unreadable; quoted-printable is used for mostly-text bodies and leaves them largely legible.

Can it decode =?UTF-8?Q?...?= headers?

Yes. Encoded-word headers in the Q (quoted-printable) form are recognised and decoded, which is what you need for garbled Subject and sender names.

Quoted-Printable Decoder

Decode MIME quoted-printable email encoding back to plain text.

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RAW INPUT

DECODED

Output appears here as you type — decoded on your device.

Input is processed on your device. Nothing you paste is sent anywhere.

What is the Quoted-Printable Decoder?

Quoted-printable is a MIME content-transfer encoding that keeps mostly-ASCII text readable by escaping only non-ASCII and special bytes as =XX hex pairs, and a quoted-printable decoder reverses those escapes.

Email was built for 7-bit ASCII, so any message containing accented letters, emoji or long lines needs an encoding. Quoted-printable (RFC 2045) is the option that keeps text mostly human-readable: ordinary characters pass through untouched, while bytes outside the safe range become an = followed by two hex digits. A trailing = at end of line is a 'soft break' inserted only to keep lines under 76 characters.

That is why raw email source is littered with =20 (space), =3D (a literal equals sign) and =C3=A9 (é in UTF-8). This decoder converts those escapes back, rejoins soft-wrapped lines, and also understands encoded-word headers of the form =?UTF-8?Q?...?= that appear in Subject and From fields.

Quoted-Printable Decoder at a glance

Specification: RFC 2045 (MIME Part One)
Escape form: =XX where XX is a hex byte
Soft line break: A trailing = at end of line
Header form: =?charset?Q?encoded-text?=

How to use the Quoted-Printable Decoder

1Copy the quoted-printable body or header out of the raw email source.
2Paste it in — soft line breaks and =XX escapes are resolved automatically.
3Read the reconstructed text and copy it out.

When you would reach for it

Reading a raw .eml message body that arrived full of =3D and =C3=A9 sequences.
Decoding a mangled Subject: header during email deliverability debugging.
Extracting the real text from a phishing sample during incident response.

Quoted-Printable Decoder — frequently asked questions

Last reviewed 25 July 2026 · questions or corrections: contact@decoder.tools