From 8fcb2d51c8d41c032142af59796cb95395e3eb9d Mon Sep 17 00:00:00 2001 From: Claude Date: Fri, 31 Jul 2026 20:00:23 +0000 Subject: [PATCH] Add Slack Emoji Maker tool Open, drag-drop, or paste any image, then prepare it as a Slack custom emoji: automatic and click-to-select background removal with adjustable tolerance, interactive square cropping (plus trim/pad helpers), resizing and color reduction to get under Slack's 128KB PNG limit, live size feedback, light/dark Slack previews, and download or copy to clipboard. Co-Authored-By: Claude Fable 5 Claude-Session: https://claude.ai/code/session_01UeXJ6yn95J6fSjoqhPSSos --- slack-emoji-maker.html | 897 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 897 insertions(+) create mode 100644 slack-emoji-maker.html diff --git a/slack-emoji-maker.html b/slack-emoji-maker.html new file mode 100644 index 00000000..f4488b81 --- /dev/null +++ b/slack-emoji-maker.html @@ -0,0 +1,897 @@ + + + + + +Slack Emoji Maker + + + +

Slack Emoji Maker

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Turn any image into a custom Slack emoji: square, transparent background, PNG under 128KB.

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+ Drag and drop an image here, click to select a file, or paste from your clipboard +
JPG, PNG, GIF, WebP, SVG… anything your browser can open. Very large images are scaled down to 1024px.
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Click anywhere on the image to remove that color. The checkerboard shows transparent areas.

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+ Remove background +
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Higher tolerance removes a wider range of similar colors. Undo and retry if it eats too much.

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+ Make it square +
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+ Shrink +
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Slack displays emoji at up to 128×128, so resizing to 128px is almost always the right move.

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+ Result +
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+ Preview in Slack +
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+ 22px preview on light background + 64px preview on light background + Light mode +
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+ 22px preview on dark background + 64px preview on dark background + Dark mode +
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Slack custom emoji work best as square PNGs with transparent backgrounds, under 128KB — Slack scales them down to 128×128. Add yours in Slack via your workspace name → Customize workspace, or the "Add emoji" button in the emoji picker.

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