Font Awesome 4 vs. Font Awesome 6

Notes:

Icon v4 v6 (Regular) v6 (Solid)
music
search
envelope-o
heart
star
star-o
user
film
th-large
th
th-list
check
remove
close
times
search-plus
search-minus
power-off
gear
cog
trash-o
home
file-o
clock-o
road
download
arrow-circle-o-down
arrow-circle-o-up
inbox
play-circle-o
rotate-right
repeat
refresh
list-alt
lock
flag
headphones
qrcode
barcode
tag
tags
book
bookmark
print
camera
font
bold
italic
text-height
text-width
align-left
align-center
align-right
align-justify
list
dedent
outdent
indent
video-camera
photo
image
picture-o
pencil
map-marker
adjust
tint
edit
pencil-square-o
share-square-o
check-square-o
arrows
step-backward
fast-backward
backward
play
pause
stop
forward
fast-forward
step-forward
eject
chevron-up
chevron-down
chevron-left
chevron-right
plus-circle
minus-circle
times-circle
check-circle
question-circle
info-circle
crosshairs
times-circle-o
check-circle-o
ban
arrow-left
arrow-right
arrow-up
arrow-down
mail-forward
share
expand
compress
plus
minus
asterisk
exclamation-circle
gift
leaf
fire
eye
eye-slash
warning
exclamation-triangle
plane
calendar
random
comment
magnet
retweet
shopping-cart
folder
folder-open
arrows-v
arrows-h
bar-chart-o
bar-chart
camera-retro
key
gears
cogs
comments
thumbs-o-up
thumbs-o-down
star-half
heart-o
sign-out
thumb-tack
external-link
sign-in
trophy
upload
lemon-o
phone
square-o
bookmark-o
phone-square
unlock
credit-card
feed
rss
hdd-o
bullhorn
bell
certificate
hand-o-right
hand-o-left
hand-o-up
hand-o-down
arrow-circle-left
arrow-circle-right
arrow-circle-up
arrow-circle-down
globe
wrench
tasks
filter
briefcase
arrows-alt
group
users
chain
link
cloud
flask
cut
scissors
copy
files-o
paperclip
save
floppy-o
square
navicon
bars
list-ul
list-ol
strikethrough
underline
table
magic
truck
money
caret-down
caret-up
caret-left
caret-right
columns
unsorted
sort
sort-down
sort-desc
sort-up
sort-asc
envelope
rotate-left
undo
legal
gavel
dashboard
tachometer
comment-o
comments-o
flash
bolt
sitemap
umbrella
paste
clipboard
lightbulb-o
exchange
cloud-download
cloud-upload
stethoscope
suitcase
bell-o
coffee
file-text-o
building-o
hospital-o
ambulance
medkit
fighter-jet
h-square
plus-square
angle-double-left
angle-double-right
angle-double-up
angle-double-down
angle-left
angle-right
angle-up
angle-down
desktop
laptop
tablet
mobile-phone
mobile
circle-o
quote-left
quote-right
spinner
circle
mail-reply
reply
folder-o
folder-open-o
smile-o
frown-o
meh-o
gamepad
keyboard-o
flag-o
flag-checkered
terminal
mail-reply-all
reply-all
star-half-empty
star-half-full
star-half-o
location-arrow
crop
unlink
chain-broken
question
info
exclamation
superscript
subscript
eraser
puzzle-piece
microphone
microphone-slash
shield
calendar-o
fire-extinguisher
rocket
chevron-circle-left
chevron-circle-right
chevron-circle-up
chevron-circle-down
anchor
unlock-alt
bullseye
ellipsis-h
ellipsis-v
rss-square
play-circle
ticket
minus-square
minus-square-o
level-up
level-down
check-square
pencil-square
external-link-square
share-square
compass
toggle-down
caret-square-o-down
toggle-up
caret-square-o-up
toggle-right
caret-square-o-right
dollar
usd
file
file-text
thumbs-up
thumbs-down
long-arrow-down
long-arrow-up
long-arrow-left
long-arrow-right
female
male
sun-o
moon-o
archive
bug
arrow-circle-o-right
arrow-circle-o-left
toggle-left
caret-square-o-left
dot-circle-o
wheelchair
plus-square-o
space-shuttle
envelope-square
institution
bank
university
mortar-board
graduation-cap
language
fax
building
child
paw
cube
cubes
recycle
automobile
car
cab
taxi
tree
database
file-pdf-o
file-word-o
file-excel-o
file-powerpoint-o
file-photo-o
file-picture-o
file-image-o
file-zip-o
file-archive-o
file-sound-o
file-audio-o
file-movie-o
file-video-o
file-code-o
life-bouy
life-buoy
life-saver
support
life-ring
circle-o-notch
send
paper-plane
send-o
paper-plane-o
history
circle-thin
header
paragraph
sliders
share-alt
share-alt-square
bomb
soccer-ball-o
futbol-o
tty
binoculars
plug
newspaper-o
wifi
calculator
cc-visa
cc-mastercard
cc-discover
cc-amex
cc-paypal
cc-stripe
bell-slash
bell-slash-o
trash
copyright
at
eyedropper
paint-brush
birthday-cake
area-chart
pie-chart
line-chart
toggle-off
toggle-on
bicycle
bus
cc
cart-plus
cart-arrow-down
diamond
ship
motorcycle
street-view
heartbeat
venus
mars
mercury
intersex
transgender
transgender-alt
venus-double
mars-double
venus-mars
mars-stroke
mars-stroke-v
mars-stroke-h
neuter
genderless
server
hotel
bed
train
subway
battery-4
battery
battery-full
battery-3
battery-three-quarters
battery-2
battery-half
battery-1
battery-quarter
battery-0
battery-empty
mouse-pointer
i-cursor
object-group
object-ungroup
sticky-note
sticky-note-o
cc-jcb
cc-diners-club
clone
balance-scale
hourglass-o
hourglass-1
hourglass-start
hourglass-2
hourglass-half
hourglass-3
hourglass-end
hourglass
hand-grab-o
hand-rock-o
hand-stop-o
hand-paper-o
hand-pointer-o
hand-peace-o
trademark
registered
tv
television
calendar-plus-o
calendar-minus-o
calendar-times-o
calendar-check-o
industry
map-pin
map-signs
map-o
map
credit-card-alt
pause-circle
pause-circle-o
stop-circle
stop-circle-o
shopping-bag
shopping-basket
hashtag
percent
universal-access
wheelchair-alt
question-circle-o
blind
audio-description
braille
assistive-listening-systems
asl-interpreting
american-sign-language-interpreting
deafness
hard-of-hearing
deaf
signing
sign-language
handshake-o
envelope-open
envelope-open-o
address-book
address-book-o
vcard
address-card
vcard-o
address-card-o
user-o
user-md
thermometer-4
thermometer
thermometer-full
thermometer-3
thermometer-three-quarters
thermometer-2
thermometer-half
thermometer-1
thermometer-quarter
thermometer-0
thermometer-empty
podcast
times-rectangle
times-rectangle-o
snowflake-o