pleroma/docs/config/custom_emoji.md

Custom Emoji

To add custom emoji:

• Add the image file(s) to priv/static/emoji/custom
• In case of conflicts: add the desired shortcode with the path to config/custom_emoji.txt, comma-separated and one per line
• Force recompilation (mix clean && mix compile)

Example:

image files (in /priv/static/emoji/custom): happy.png and sad.png

content of config/custom_emoji.txt:

happy, /emoji/custom/happy.png, Tag1,Tag2
sad, /emoji/custom/sad.png, Tag1
foo, /emoji/custom/foo.png

The files should be PNG (APNG is okay with .png for image/png Content-type) and under 50kb for compatibility with mastodon.

Emoji tags (groups)

Default tags are set in config.exs.

config :pleroma, :emoji,
  shortcode_globs: ["/emoji/custom/**/*.png"],
  groups: [
    Finmoji: "/finmoji/128px/*-128.png",
    Custom: ["/emoji/*.png", "/emoji/custom/*.png"]
  ]

Order of the groups matters, so to override default tags just put your group on top of the list. E.g:

config :pleroma, :emoji,
  shortcode_globs: ["/emoji/custom/**/*.png"],
  groups: [
    "Finmoji special": "/finmoji/128px/a_trusted_friend-128.png", # special file
    "Cirno": "/emoji/custom/cirno*.png", # png files in /emoji/custom/ which start with `cirno`
    "Special group": "/emoji/custom/special_folder/*.png", # png files in /emoji/custom/special_folder/
    "Another group": "/emoji/custom/special_folder/*/.png", # png files in /emoji/custom/special_folder/ subfolders
    Finmoji: "/finmoji/128px/*-128.png",
    Custom: ["/emoji/*.png", "/emoji/custom/*.png"]
  ]

Priority of tags assigns in emoji.txt and custom.txt:

tag in file > special group setting in config.exs > default setting in config.exs

Priority for globs:

special group setting in config.exs > default setting in config.exs