What are the recommended dimensions for Slack emojis?

Slack recommends 128x128 pixels for animated emojis to ensure clarity and proper rendering within the chat interface.

Can I use my own images with this skill?

Yes, the skill is designed to work with PIL (Pillow), allowing you to load user-uploaded images to use as base frames, textures, or creative inspiration.

How does this skill optimize GIF file sizes for Slack?

The skill implements strategies such as reducing the color palette (typically to 48-128 colors), lowering the FPS, and automatically removing duplicate frames during the save process.

What types of animation effects can I create?

The skill provides utilities and guidance for a wide range of effects including pulsing, shaking, bouncing, rotating, fading, and even complex particle bursts.

Slack GIF Creator

Name: Slack GIF Creator
Author: zephyrwang6

byzephyrwang6

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Collaboration Tools

Generates optimized, high-quality animated GIFs tailored specifically for Slack emojis and messages using Python's PIL.

About

Slack GIF Creator is a specialized Claude Code Skill that provides the knowledge and programmatic utilities needed to build creative animations for the Slack environment. It offers precise control over dimensions, frame rates, and color palettes to ensure GIFs meet Slack’s strict file size and rendering requirements. Whether you're building custom emoji reactions or informational message animations, this skill provides easing functions, shape primitives, and optimization strategies to produce professional-grade visuals directly through code.

Key Features

Slack-optimized presets for emojis (128x128) and message GIFs (480x480)
Built-in validation tools to ensure compatibility with Slack’s upload constraints
Support for complex animation concepts like particle bursts, pulses, and shaking effects
Advanced animation easing functions including bounce, elastic, and ease-in-out
Comprehensive optimization strategies for reducing file size and color counts
37 GitHub stars

Use Cases

Transforming static user-uploaded images into dynamic, Slack-ready animations
Generating programmatic progress bars or status animations for automated Slack notifications
Creating custom animated emojis for team-specific Slack reactions

About

Key Features

Slack-optimized presets for emojis (128x128) and message GIFs (480x480)
Built-in validation tools to ensure compatibility with Slack’s upload constraints
Support for complex animation concepts like particle bursts, pulses, and shaking effects
Advanced animation easing functions including bounce, elastic, and ease-in-out
Comprehensive optimization strategies for reducing file size and color counts
37 GitHub stars

Use Cases

Transforming static user-uploaded images into dynamic, Slack-ready animations
Generating programmatic progress bars or status animations for automated Slack notifications
Creating custom animated emojis for team-specific Slack reactions