How does this skill handle Slack's 64KB emoji limit?

It employs aggressive optimization strategies including color quantization (limiting to 32-48 colors), frame count reduction (typically 10-15 frames), and real-time file size validation.

Is this tool limited to creating Slack emojis?

No, it supports both Emoji GIFs (64KB limit, 128x128) and Message GIFs (up to 2MB, 480x480), providing specific validators for each use case.

Does it support adding text to small GIFs?

Yes, it includes specialized typography helpers that use high-contrast outlines to ensure text remains readable even at the 128x128 resolution used for Slack emojis.

What technical stack does this skill use?

The skill provides a Python-based framework using the GIFBuilder core and various templates to handle frame generation, easing, and assembly.

Can I combine multiple animation types in one GIF?

Yes, the animation primitives are designed to be composable building blocks, allowing you to layer effects like combining a bounce motion with a shake impact.

Slack GIF Creator

Name: Slack GIF Creator
Author: kivilaid

bykivilaid

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Design Tools

Generates and optimizes animated GIFs and custom emojis specifically tailored for Slack's technical constraints.

A comprehensive toolkit designed to help developers and creators build custom animations for Slack. It features a suite of animation primitives—including shaking, bouncing, and exploding effects—alongside strict validation tools to ensure GIFs meet Slack’s specific file size limits, particularly the challenging 64KB emoji constraint. Whether you're creating a custom reaction or a complex message animation, this skill provides the building blocks and optimization logic needed for seamless Slack integration.

Key Features

016 GitHub stars

02Strict Slack size and dimension validators for emojis and messages

03Typography helpers with outlines for enhanced small-scale readability

04Advanced visual effects like particle systems and kaleidoscope filters

05Composable animation primitives including shake, bounce, morph, and zoom

06High-performance GIF builder with aggressive color quantization

Use Cases

01Generating branded reaction GIFs from text descriptions for team workspace

02Automating the creation of complex motion graphics for internal announcements

03Creating custom animated emojis under the strict 64KB Slack limit

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add kivilaid/plugin-marketplace slack-gif-creator

For use in Claude.ai and ChatGPT

Download Skill