Export Slack custom emoji

export.sh

#!/bin/sh

# You can get on https://api.slack.com/methods/emoji.list/test
endpoint='https://slack.com/api/emoji.list?token=<SECRET>&pretty=1'

json=$(curl -s $endpoint)
keys=$(echo $json | jq -r '.emoji | keys[]')

mkdir -p images

for key in $keys; do
  url=$(echo $json | jq -r ".emoji[\"$key\"]")

  if echo $url | grep -q -e '^alias'; then
    continue
  fi

  echo "$key: $url"
  curl -s $url > images/$key
done

1. Export to images/* using this script
2. Bulk import using Slack Emoji Tools

thx! Slackの絵文字(emoji)を一括エクスポート＆インポートする - Qiita