Extracting / Exporting custom emoji from Slack

README.MD

Extracting Emoji From Slack!

Slack doesn't provide an easy way to extract custom emoji from a team. (Especially teams with thousands of custom emoji) This Gist walks you through a relatively simple approach to get your emoji out.

If you're an admin of your own team, you can get the list of emoji directly using this API: https://api.slack.com/methods/emoji.list. Once you have it, skip to Step 3

HOWEVER! This gist is intended for people who don't have admin access, nor access tokens for using that list.

Follow along...

Step 1

Open your Slack team on your browser (I used FireFox in this example)

Next, Open your developer tools, and go to the network tab. Look for a POST request on /emoji.list

Step 2

Right Click on the request, and choose to open it in a new tab.

This will cause the browser to replay the request, yielding a JSON file with all your emoji information.

Save this file somewhere as emoji.json

Step 3

Run download.sh on the file. (Make sure you chmod +x it to make it executable. Details on the download.sh file.

./download.sh emoji.json

Sit back and wait. This will create a folder called output and will save all your emoji to it.

Optional Step 4

To bulk upload your emoji into a new team, use this chrome extension: https://chrome.google.com/webstore/detail/neutral-face-emoji-tools/anchoacphlfbdomdlomnbbfhcmcdmjej

Notes

1- This downloads files sequentially, one at a time. I didn't want to incurr Slack's rage by hammering their edge server with concurrent downloads. 2- This will duplicate aliased emoji

download.sh

#!/usr/bin/env bash
######
## UPDATE for 2019: I completely changed my approach on how to obtain the emoji dump.
## The new approach results in a JSON file, so the processing is a bit diferent than
## with the previous version.  This version will also take care of aliased emoji.

# Use:
# Make this file executable, and feed it the results from the Slack emoji URL dump. Files will be downloaded to `output`
# 	chmod +x download.sh
# 	./download.sh emoji.json




# Input File
INPUT="$1"

# Create output directory where downloaded emoji will be stored
mkdir -p output;


# Clean Up Source File:
# Break up the file into individual lines for processing (Comma and { to NewLine)
# Slack's emoji JSON brings an unwanted escape character "\". We need to remove it.
# We'll also remove unwanted quote marks `"` and curly braces "{"  "}"

RAW_LIST=$(cat "${INPUT}" | tr ",{" "\\n" | sed -E 's/[\\"{}]//g')

# Separate into Custom Emoji (Ignoring slack's default ones) and Aliases

# Filter for custom emoji (ie: Anything on emoji.slack-edge.com), and remove the ":" separator
EMOJI_LIST=$( echo "${RAW_LIST}" | grep "https://emoji.slack-edge.com" | sed 's/:https/ https/')

# Filter for the aliases, and remove the separator
ALIAS_LIST=$( echo "${RAW_LIST}" | grep ":alias:" | sed 's/:alias:/ /' )


# First download all the emoji
echo "${EMOJI_LIST}" |
while read -r line || [[ -n "$line" ]]; do
	parts=($line)
	url=${parts[1]}
	name=${parts[0]}
	extension=${url##*.}

	echo "Downloading ${name}.${extension}"
	curl -s -o "output/${name}.${extension}" "${url}"

done;

# Now duplicate all the aliases
echo "${ALIAS_LIST}" |
while read -r line || [[ -n "$line" ]]; do
	parts=($line)
	alias=${parts[0]}
	source=${parts[1]}


	target=$(echo "${EMOJI_LIST}" | grep "${source} ")
	extension=${target##*.}


	echo "Looking for source of ${alias} in ${source} -> ${target}"
	echo "copying output/${source}.${extension} to output/${alias}.${extension}"
	cp "output/${source}.${extension}" "output/${alias}.${extension}"

done;

For those coming here in 2025 who aren't admins, here is a low code method which I found easier. You'll need jq, wget

• Go to the emoji customization page for the relevant workspace; you can get to the general customization page directly from Slack; if you aren't an admin of some kind you'll likely be brought to the Custom emoji page to begin with.
• Open Web Developer tools in your browser and ensure you're on the Network section
• Refresh the page
• Slowly scroll to the bottom
• Pause recording in the Network list in Web Developer tools
• Filter the Network list in Web Developer tools to show only emoji.slack-edge.com entries
• Right-click any line and choose Save All as HAR; the downloaded file is a JSON file with all the emoji URL's in it.
• Now download the files:
  • Parse the HAR with jq to get JUST the URL's into a file
  • Iterate over that file with wget to download them (whilst also renaming them to add the path part before the filename so you also get the custom names)
  • Rename all the files to the path part, not the random name

  $ cat <wahteveryourcompany/groupis>.slack.com_Archive.har | jq .log.entries[].request.url -r > emoji_list.txt
  $ while read line; do wget $line -w2 --random-wait -O "$(echo $line | cut -d /  -f 5- | tr / _)"; done < emoji_list.txt
  $ for file in *; do ext=.${file##*.}; [ "$ext" = ".$file" ] && ext=""; nostr=${file%%_*}; mv "$file" "$nostr$ext"; done
  

For uploading into Slack, use Chrome + Neutral Face Emoji Tools (be sure to manually upload 1 file first, or that plugin won't show up on the upload page).