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Discord / Slack Emoji Optimizer

Resize and auto-compress images to fit emoji upload limits — Discord (≤256 KB), Discord Nitro animated (≤512 KB), Slack (≤128 KB), or Telegram (≤512 KB). Picks output dimensions and binary-searches quality to land just under the limit.

Drag an image here or

Resizes + compresses for Discord (≤256 KB, max 128×128) or Slack (≤128 KB, max 128×128). Auto-balances size and quality.

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How to use Discord / Slack Emoji Optimizer

  1. Drop an image.
  2. Pick platform, target dimensions, and format.
  3. Click Download Optimized.

What is Discord / Slack Emoji Optimizer?

Custom emoji upload limits are notoriously strict and platforms reject your file with no helpful guidance. This tool center-crops to square and tries WebP / JPEG quality steps to fit your chosen platform's hard limit, then tells you the final file size.

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FAQ

Why doesn't it support GIF?
Animated GIF re-encoding requires significant client-side compute. For animated emoji, upload the original .gif (Discord auto-rejects above 256 KB).

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