Download Custom Slack Emojis

README.md

Download Emojis from Slack Web Client

Use the emoji.list Slack API to download the custom emojis list from Slack. Due to the CORS policy on emoji endpoints, it is not possible to download the emojis from the Slack web client using JavaScript. Emoji URLs do not require authentication, however, so they can be downloaded outside the browser.

Get CSV

Run download.js in your browser to dowload a CSV containing filename,url for each custom emoji.

Download

Run download.sh to download files from the CSV and save them to the current directory.

On Windows, run download.ps1 in the same folder as the CSV.

download.js

// grab slack custom emoji URLs and save as CSV

var emojis = {};

// get auth token for API request
var authToken = JSON.parse(localStorage.localConfig_v2).teams[slackDebug.activeTeamId].token;

// setup request
var formData = new FormData();
formData.append('token', authToken);

(async () => {
  const rawResponse = await fetch('/api/emoji.list', {
    method: 'POST',
    body: formData
  });

  const emojisApi = await rawResponse.json();
  
  emojis = emojisApi.emoji;
  
  // generate CSV
  var csvContent = 'data:text/csv;charset=utf-8,';

  for (const [name, url] of Object.entries(emojis)) {
    if (typeof url === 'string' && url.startsWith('http')) {
      var filename = name.replace("'", "\\'") + '.' + url.split('.').pop();

      csvContent += filename + ',' + url + '\n';
    }
  }

  // download csv
  var encodedUri = encodeURI(csvContent);

  var csvDownloader = document.createElement('a');
  csvDownloader.href = encodedUri;
  csvDownloader.download = 'emojis.csv';

  document.body.appendChild(csvDownloader);
  csvDownloader.click();
  document.body.removeChild(csvDownloader);
})();

download.ps1

$emojis = Import-Csv -Path .\emojis.csv -Header 'Name','Url'

foreach ($emoji in $emojis) {
  Invoke-WebRequest -Uri $emoji.Url -OutFile $emoji.Name
}

download.sh

for emoji_line in $(cat emojis.csv); do
  name=$(echo "$emoji_line" | cut -d, -f1)
  url=$(echo "$emoji_line" | cut -d, -f2)

  wget -O "$name" "$url"
done