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Slack GIF Creator

Official

Creates and validates animated GIFs that fit Slack's emoji and message requirements using Python/PIL.

Image & VideoIntermediate★ 169,728⑂ 20,204AI score 9/10Last updated: Aug 13, 2026

What it does

  • Builds animations within Slack's real limits: 128x128 emoji, 480x480 message GIFs, 10–30 FPS, 48–128 colors, under 3 seconds.
  • Uses GIFBuilder to assemble and optimize frames, and validators to confirm the file is Slack-ready.
  • Ships easing functions (bounce_out, elastic_out, back_out, etc.) and frame helpers for gradients, stars, circles, and text.
  • Documents recipes for shake, heartbeat pulse, bounce, spin, fade, slide, zoom, and particle-burst effects.

Who it's for

  • Anyone maintaining custom emoji for a team Slack workspace
  • Developers and marketers who want GIF production scripted instead of manual
  • People who need quick motion graphics with only Python, no design software

Example uses

  1. "Make a 128x128 Slack emoji of our logo bouncing" → 12 frames with bounce_out easing, saved at 48 colors.
  2. "Build a 480x480 celebration sparkle burst" → particle burst combined with alpha fade-out.
  3. "Turn the PNG I uploaded into a vibrating emoji" → load the image with PIL, apply sine-wave offsets, then validate size.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/anthropics/skills/HEAD/skills/slack-gif-creator/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the skills/slack-gif-creator folder from the GitHub repo anthropics/skills into my ~/.claude/skills/slack-gif-creator/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/anthropics/skills.git && mkdir -p ~/.claude/skills && cp -r skills/skills/slack-gif-creator ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal and confirm Python is available: python3 --version
  2. Install the dependencies: pip install pillow imageio numpy
  3. Clone the skills repository: git clone https://github.com/anthropics/skills.git
  4. Copy the skill into Claude's skills folder: mkdir -p ~/.claude/skills && cp -r skills/skills/slack-gif-creator ~/.claude/skills/
  5. Verify that ~/.claude/skills/slack-gif-creator/ contains SKILL.md and the core/ directory.
  6. Restart Claude Code and ask something like "make me a Slack emoji GIF of a bouncing rocket" to trigger the skill.
View source on GitHub ↗