Workplace3 min read
Why Your Custom Slack Emojis Look Blurry (128px Rule)
By Image Size Compress Team•
Slack is aggressive with resizing. If you upload a huge image as an emoji, Slack's downscaler often ruins it.
Pre-Resize for Success
The optimal size for Slack is a 128x128 pixel square PNG with a transparent background. Use our Resizer & Converter to prep your image before uploading for the sharpest results.