How does it ensure text is readable on small emoji GIFs?

It includes a specialized typography utility that applies high-contrast outlines and optimized scaling to text, ensuring visibility even at 128x128 resolution.

Do I need external software like Photoshop or Giphy?

No, this skill provides all necessary programmatic tools for frame generation, assembly, and color optimization directly within your Claude Code environment.

What types of animation paths are supported?

It supports linear, arc, circular, and wave movements, all of which can be customized with various easing functions like ease_in, ease_out, and bounce.

Can I combine multiple animation effects?

Absolutely. The toolkit uses composable primitives, allowing you to layer effects like bounce, shake, and rotate simultaneously to create complex custom motions.

Does it handle the 64KB limit for Slack emojis?

Yes, it includes specialized emoji-mode optimizations and size validators specifically designed to meet Slack's strict 64KB requirement through aggressive color quantization and frame management.

Slack GIF Creator

Name: Slack GIF Creator
Author: Jst-Well-Dan

byJst-Well-Dan

0•

Design Tools

Generates and optimizes animated GIFs and emojis specifically for Slack's unique file size and dimension constraints.

The Slack GIF Creator is a specialized toolkit for developers and creators to build custom animations directly within Claude Code. It provides a robust set of animation primitives—including motion, effects, and transitions—paired with strict validation tools to ensure every GIF fits within Slack's message (~2MB) or emoji (64KB) limits. Whether you're creating a simple shaking emoji or a complex exploding message GIF, this skill handles the heavy lifting of color quantization, FPS management, and layout, allowing for high-quality creative output that is ready for immediate upload to any workspace.

Key Features

01Built-in validators for Slack message and emoji size constraints

02Advanced visual effects including particle systems, kaleidoscopes, and motion blur

03Aggressive optimization engine for fitting detailed animations into 64KB limits

040 GitHub stars

05Library of composable animation primitives like shake, bounce, spin, and morph

06Automated color management and high-readability text rendering with outlines

Use Cases

01Generating branded message GIFs with specific motion paths and text overlays

02Creating custom reaction emojis that meet the strict 64KB file size limit

03Building animated loading indicators or notification icons for team workspaces

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jst-well-dan/skill-box slack-gif-creator

For use in Claude.ai and ChatGPT

Download Skill