Below is a list of potential QWERTY keyboard 'typos' (typing mistakes) for the phrase 'muffins', from the free online typo generator. Enter another phrase to see possible typing errors, or select from one of the "top typos" charts.
Original
muffins
Transposition0
umffins
mfufins
mufifns
muffnis
muffisn
Transposition1
fumfins
mffuins
muiffns
mufnifs
muffsni
Transposition2
fufmins
miffuns
munfifs
mufsinf
Transposition2r
ffumins
miffuns
muniffs
mufsnif
Transposition0x2
umffins
umfifns
umffnis
umffisn
mfuifns
mfufnis
mfufisn
muffnis
muffisn
mufifsn
Slip3A
ufmfins
mffuins
mufifns
mufinfs
muffnsi
Slip3B
fmufins
mfufins
muiffns
mufnfis
muffsin
Omission
uffins
mffins
mufins
muffns
muffis
muffin
Repetition
mmuffins
muuffins
mufffins
muffiins
muffinns
muffinss
QWERTY Substitution
nuffins
myffins
miffins
mudfins
mugfins
mufdins
mufgins
muffuns
muffons
muffibs
muffims
muffina
muffind
QWERTY Repetition after
mnuffins
muyffins
muiffins
mufdfins
mufgfins
muffdins
muffgins
muffiuns
muffions
muffinbs
muffinms
muffinsa
muffinsd
QWERTY Repetition before
nmuffins
myuffins
miuffins
mudffins
mugffins
mufdfins
mufgfins
muffuins
muffoins
muffibns
muffimns
muffinas
muffinds
QWERTY Substitution Transposed
unffins
nfufins
nufifns
nuffnis
nuffisn
ymffins
mfyfins
myfifns
myffnis
myffisn
imffins
mfifins
mififns
miffnis
miffisn
umdfins
mdufins
mufdins
mudifns
mudfnis
mudfisn
umgfins
mgufins
mufgins
mugifns
mugfnis
mugfisn
umfdins
mfudins
mudfins
mufidns
mufdnis
mufdisn
umfgins
mfugins
mugfins
mufigns
mufgnis
mufgisn
umffuns
mfufuns
mufufns
muffnus
muffusn
umffons
mfufons
mufofns
muffnos
muffosn
umffibs
mfufibs
mufifbs
muffbis
muffisb
umffims
mfufims
mufifms
muffmis
muffism
umffina
mfufina
mufifna
muffnia
muffian
umffind
mfufind
mufifnd
muffnid
muffidn
WrongDoubles
muufins
mufiins
$JSON
$address
$applyDefault
$clone
$commas
$copy
$copyFields
$delete
$entries
$expand
$filt
$getType
$isArray
$isBoolean
$isClass
$isDate
$isElement
$isFunction
$isNumber
$isObject
$isString
$isType
$isValidDate
$json2txt
$keys
$load
$matchall
$parseFloats
$pick
$postJSON
$prune
$save
$set
$sortBy
$stringify
$sum
$svgPoster1
$table
$textify
$toFixed
$type
$without
Glossary
Transposition = adjacent pairs of letters are swapped
Omission = individual letters are missed out
Repetition = individual letters are entered twice consecutively
QWERTY substitution = letters are replaced by each of their QWERTY-keyboard based physical neighbours (e.g. 'h' gets replaced with y, u, j, n, b, g)
QWERTY repetition type 1 = letters are followed by each of their QWERTY-keyboard neighbours
QWERTY repetition type 2 = letters are preceded by each of their QWERTY-keyboard neighbours