Slack Gif Creator

composiohq/awesome-claude-skillsOfficial

This is a surprisingly complete toolkit for something as specific as Slack GIFs. It gives you validators that actually check the 64KB emoji limit (which is genuinely strict), plus composable primitives like shake, bounce, explode, and morph that you can combine however you want. The primitives are well thought out with things like easing options, arc trajectories, and heartbeat pulses. What's useful is the clear distinction between message GIFs (2MB, more forgiving) and emoji GIFs (64KB, painful), plus specific strategies for hitting that tiny limit like using 32-48 colors and 10-15 frames max. If you've ever tried to manually optimize an animated emoji for Slack, you know how annoying the file size dance gets.

skills.sh installs: 4.4K
GitHub stars: 79.2K
last updated: Aug 21, 2026

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Install

$ npx -y skills add composiohq/awesome-claude-skills --skill slack-gif-creator --agent claude-code

Installs into .claude/skills of the current project.

Files

Slack GIF Creator - Flexible Toolkit

A toolkit for creating animated GIFs optimized for Slack. Provides validators for Slack's constraints, composable animation primitives, and optional helper utilities. Apply these tools however needed to achieve the creative vision.

Slack's Requirements

Slack has specific requirements for GIFs based on their use:

Message GIFs:

Max size: ~2MB
Optimal dimensions: 480x480
Typical FPS: 15-20
Color limit: 128-256
Duration: 2-5s

Emoji GIFs:

Max size: 64KB (strict limit)
Optimal dimensions: 128x128
Typical FPS: 10-12
Color limit: 32-48
Duration: 1-2s

Emoji GIFs are challenging - the 64KB limit is strict. Strategies that help:

Limit to 10-15 frames total
Use 32-48 colors maximum
Keep designs simple
Avoid gradients
Validate file size frequently

Toolkit Structure

This skill provides three types of tools:

Validators - Check if a GIF meets Slack's requirements
Animation Primitives - Composable building blocks for motion (shake, bounce, move, kaleidoscope)
Helper Utilities - Optional functions for common needs (text, colors, effects)

SKILL.md on GitHub