Smileys are supported in markdown text, and converted to the corresponding emojis. The following table1 lists recognized smileys:

Characters Smiley Emoji
<3 :heart: :heart:
</3 :broken_heart: :broken_heart:
:') :joy: :joy:
:'-) :joy: :joy:
:D :smiley: :smiley:
:-D :smiley: :smiley:
=D :smiley: :smiley:
:) :smile: :smile:
:-) :smile: :smile:
=] :smile: :smile:
=) :smile: :smile:
:] :smile: :smile:
':) :sweat_smile: :sweat_smile:
':-) :sweat_smile: :sweat_smile:
'=) :sweat_smile: :sweat_smile:
':D :sweat_smile: :sweat_smile:
':-D :sweat_smile: :sweat_smile:
'=D :sweat_smile: :sweat_smile:
>:) :laughing: :laughing:
>;) :laughing: :laughing:
>:-) :laughing: :laughing:
>=) :laughing: :laughing:
;) :wink: :wink:
;-) :wink: :wink:
*-) :wink: :wink:
*) :wink: :wink:
;-] :wink: :wink:
;] :wink: :wink:
;D :wink: :wink:
;^) :wink: :wink:
':( :sweat: :sweat:
':-( :sweat: :sweat:
'=( :sweat: :sweat:
:* :kissing_heart: :kissing_heart:
:-* :kissing_heart: :kissing_heart:
=* :kissing_heart: :kissing_heart:
:^* :kissing_heart: :kissing_heart:
>:P :stuck_out_tongue_winking_eye: :stuck_out_tongue_winking_eye:
X-P :stuck_out_tongue_winking_eye: :stuck_out_tongue_winking_eye:
x-p :stuck_out_tongue_winking_eye: :stuck_out_tongue_winking_eye:
>:[ :disappointed: :disappointed:
:-( :disappointed: :disappointed:
:( :disappointed: :disappointed:
:-[ :disappointed: :disappointed:
:[ :disappointed: :disappointed:
=( :disappointed: :disappointed:
>:( :angry: :angry:
>:-( :angry: :angry:
:@ :angry: :angry:
:'( :cry: :cry:
:'-( :cry: :cry:
;( :cry: :cry:
;-( :cry: :cry:
>.< :persevere: :persevere:
:$ :flushed: :flushed:
=$ :flushed: :flushed:
#-) :dizzy_face: :dizzy_face:
#) :dizzy_face: :dizzy_face:
%-) :dizzy_face: :dizzy_face:
%) :dizzy_face: :dizzy_face:
X) :dizzy_face: :dizzy_face:
X-) :dizzy_face: :dizzy_face:
*\0/* :ok_woman: :ok_woman:
\0/ :ok_woman: :ok_woman:
*\O/* :ok_woman: :ok_woman:
\O/ :ok_woman: :ok_woman:
O:-) :innocent: :innocent:
0:-3 :innocent: :innocent:
0:3 :innocent: :innocent:
0:-) :innocent: :innocent:
0:) :innocent: :innocent:
0;^) :innocent: :innocent:
O:-) :innocent: :innocent:
O:) :innocent: :innocent:
O;-) :innocent: :innocent:
O=) :innocent: :innocent:
0;-) :innocent: :innocent:
O:-3 :innocent: :innocent:
O:3 :innocent: :innocent:
B-) :sunglasses: :sunglasses:
B) :sunglasses: :sunglasses:
8) :sunglasses: :sunglasses:
8-) :sunglasses: :sunglasses:
B-D :sunglasses: :sunglasses:
8-D :sunglasses: :sunglasses:
-_- :expressionless: :expressionless:
-__- :expressionless: :expressionless:
-___- :expressionless: :expressionless:
>:\ :confused: :confused:
>:/ :confused: :confused:
:-/ :confused: :confused:
:-. :confused: :confused:
:/ :confused: :confused:
:\ :confused: :confused:
=/ :confused: :confused:
=\ :confused: :confused:
:L :confused: :confused:
=L :confused: :confused:
:P :stuck_out_tongue: :stuck_out_tongue:
:-P :stuck_out_tongue: :stuck_out_tongue:
=P :stuck_out_tongue: :stuck_out_tongue:
:-p :stuck_out_tongue: :stuck_out_tongue:
:p :stuck_out_tongue: :stuck_out_tongue:
=p :stuck_out_tongue: :stuck_out_tongue:
:-Þ :stuck_out_tongue: :stuck_out_tongue:
:stuck_out_tongue: :stuck_out_tongue:
:stuck_out_tongue: :stuck_out_tongue:
:-þ :stuck_out_tongue: :stuck_out_tongue:
:-b :stuck_out_tongue: :stuck_out_tongue:
:b :stuck_out_tongue: :stuck_out_tongue:
d: :stuck_out_tongue: :stuck_out_tongue:
:-O :open_mouth: :open_mouth:
:O :open_mouth: :open_mouth:
:-o :open_mouth: :open_mouth:
:o :open_mouth: :open_mouth:
O_O :open_mouth: :open_mouth:
>:O :open_mouth: :open_mouth:
:-X :no_mouth: :no_mouth:
:X :no_mouth: :no_mouth:
:-# :no_mouth: :no_mouth:
:# :no_mouth: :no_mouth:
=X :no_mouth: :no_mouth:
=x :no_mouth: :no_mouth:
:x :no_mouth: :no_mouth:
:-x :no_mouth: :no_mouth:
=# :no_mouth: :no_mouth:

  1. List inspired from: