Slack Custom Emoji Size Limit
Make your custom emojis look crisp on retina displays.
1
Square 128px
Slack asks for 128x128 pixels, but displays them at 22x22. Uploading **128x128** ensures they look good when hovered.
2
File Size
Must be under **64KB**. This is very small. Use an image compressor tool if your animated emoji is too big.