Emoji Size Checker
Pick an image or GIF and see, platform by platform, whether it fits the published upload guidance for Microsoft Teams, Slack, and Discord. It checks file size, format, dimensions, and GIF frame count, then tells you what to fix.
The file is read in your browser. Nothing is uploaded.
The limits this tool uses
| Platform | File size | Dimensions | Formats |
|---|---|---|---|
| Microsoft Teams | Under 256 KB recommended | Square | JPEG, PNG, GIF |
| Slack | Under 128 KB works best; GIFs up to 50 frames | Square | JPG, PNG, GIF |
| Discord | Under 256 KB | Up to 128 x 128 | JPEG, PNG, GIF, WebP |
These come from each platform's own help pages: Microsoft Teams, Slack, and Discord. Platforms change their rules, so treat the official page as the final word. A result of "Looks good" means the file fits the published guidance, not that an upload is guaranteed.
A square 128 x 128 image under 128 KB is a conservative starting point, not a guarantee. Animation frames and upload permission still matter. For export steps, see Custom Emoji Size Limits: Teams vs Slack vs Discord, Why Your Custom Emoji Looks Blurry, and How to Make Animated GIF Emojis. If the file needs resizing, the Emoji Maker crops and exports it in your browser.