Slack Emoji Size Guide: Create Perfect Custom Emojis

Slack Emoji Size Guide: Create Perfect Custom Emojis

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Slack Emoji Size Requirements

Maximum Dimensions: 128x128 pixels
Recommended Size: 64x64 pixels
Maximum File Size: 128 KB
Supported Formats: PNG, GIF (static & animated), JPG
Aspect Ratio: 1:1 (square)

Optimal Emoji Dimensions

While Slack accepts images up to 128x128 pixels, we recommend using 64x64 pixels for the best balance of quality and performance. Here's why:

Better loading performance in Slack
Crisp appearance in messages
Consistent size with default emojis
Smaller file size

File Format Guidelines

PNG Format (Recommended for Static Emojis)

Best for images with transparency
Sharp edges and clear text
No quality loss in compression
Perfect for logos and icons

GIF Format (For Animated Emojis)

Supports animation
Keep under 50 frames for best performance
Optimize animation speed
Compress to reduce file size

JPG Format

Suitable for photographic images
Smaller file sizes
No transparency support
Best for complex color gradients

Related Guides

Animated Emojis Guide- Learn about animated emoji requirements
Background Removal Guide- Create professional-looking emojis

Pro Tips

Always test your emoji in both light and dark Slack themes
Consider using transparent backgrounds for better compatibility
Keep animations short and subtle for professional use
Use vector sources when possible for sharper results

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