How does this skill optimize GIF file sizes?

It implements several strategies including reducing the color palette (to 48-128 colors), lowering FPS, and identifying/removing duplicate frames to stay under Slack's file limits.

What are the recommended dimensions for Slack emojis?

For Slack emojis, a square dimension of 128x128 pixels is recommended to ensure clarity and cross-platform compatibility.

What Python libraries are required for this skill?

This skill relies on the Pillow, imageio, and numpy libraries to handle image processing, GIF encoding, and mathematical calculations for animations.

Can I use my own images with this skill?

Yes, you can upload existing images and use the integrated PIL-based utilities to animate, transform, or layer them into your final GIF project.

Does it support smooth motion like bouncing or fading?

Absolutely. The skill includes an easing library that supports linear, bounce, elastic, and ease-in/out transitions for professional-looking motion graphics.

Slack GIF Creator

Name: Slack GIF Creator
Author: ZhanlinCui

byZhanlinCui

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Design Tools

Generates optimized, high-quality animated GIFs and custom emojis specifically tailored for Slack's technical requirements and constraints.

About

The Slack GIF Creator skill provides a comprehensive toolkit for building smooth, professional-grade animations directly within Claude Code. It features a specialized GIFBuilder for frame assembly, an easing library for fluid motion like bounce and elastic effects, and validation tools to ensure exports meet Slack's strict file size and dimension limits. Whether drawing graphics from scratch using PIL primitives or animating existing assets, this skill automates the technical optimization—such as color reduction and frame rate management—needed to create perfect Slack emojis and message visuals.

Key Features

17 GitHub stars
Slack-specific dimension presets for emojis (128x128) and messages (480x480)
Technical validation tools to check GIF compatibility before exporting
Automatic file size optimization via color palette reduction and duplicate removal
Advanced easing library for professional motion including bounce and elastic effects
Built-in drawing helpers for gradients, stars, and complex geometric shapes

Use Cases

Automating the conversion of static brand assets into pulsing or shaking Slack-ready graphics
Creating custom animated 'success' or 'celebration' emojis for team Slack workspaces
Generating smooth, looped instructional animations for technical documentation shared in Slack

About

Key Features

17 GitHub stars
Slack-specific dimension presets for emojis (128x128) and messages (480x480)
Technical validation tools to check GIF compatibility before exporting
Automatic file size optimization via color palette reduction and duplicate removal
Advanced easing library for professional motion including bounce and elastic effects
Built-in drawing helpers for gradients, stars, and complex geometric shapes

Use Cases

Automating the conversion of static brand assets into pulsing or shaking Slack-ready graphics
Creating custom animated 'success' or 'celebration' emojis for team Slack workspaces
Generating smooth, looped instructional animations for technical documentation shared in Slack