Below is a list of potential QWERTY keyboard 'typos' (typing mistakes) for the phrase 'free', from the free online typo generator. Enter another phrase to see possible typing errors, or select from one of the "top typos" charts.
Original
free
Transposition0
rfee
fere
Transposition1
erfe
feer
Transposition2
eref
Transposition2r
eerf
Transposition0x2
rfee
Slip3A
refe
feer
Slip3B
efre
fere
Omission
ree
fee
fre
Repetition
ffree
frree
freee
QWERTY Substitution
dree
gree
feee
ftee
frwe
frre
frew
frer
QWERTY Repetition after
fdree
fgree
freee
frtee
frewe
frere
freew
freer
QWERTY Repetition before
dfree
gfree
feree
ftree
frwee
frree
frewe
frere
QWERTY Substitution Transposed
rdee
dere
rgee
gere
efee
tfee
fete
rfwe
fwre
frew
rfre
frer
rfew
ferw
frwe
rfer
ferr
frre
WrongDoubles
frre
$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
$sortKeys
$stringify
$stringifySafe
$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