Slack Emoji Resizer

Slack rejects custom emoji over 128 KB, and big GIFs look blurry at emoji size. Upload any GIF and get a square 128×128 emoji that fits.

How it works

  1. Upload a GIF, PNG or WebP.
  2. We crop it to a square, resize to 128×128 and compress under 128 KB.
  3. Download it and add it under Slack → Customize workspace → Emoji.

Don't have a GIF yet? Make one from a text prompt with AI.

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FAQ

What are Slack's emoji limits?

Square images, 128 KB or less. Slack recommends 128×128 pixels.

My GIF is still over the limit — what now?

Fewer frames and simpler backgrounds compress best. We drop frames automatically if needed.

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