Social Media Tools

Slack Emoji Resizer

Resize static emoji artwork to a practical 128×128 square preview and check it against Slack’s recommended under-128KB file-size target.

Free No account Local processing

Drop an image here

or click to choose PNG, JPG, or WebP

Images stay on your device

Output controls

Generated presets

  • 128×128 practical square emoji preview

Practical tips

  • ✓Slack says square JPG, PNG, or GIF images under 128KB work best; it does not publish 128×128 as a required upload dimension.
  • ✓This tool exports a static PNG. Animated Slack emoji can use GIF files with up to 50 frames and need a separate animation workflow.

How to use Slack Emoji Resizer

  1. 1

    Upload the image you want to process with Slack Emoji Resizer.

  2. 2

    Choose a crop mode and adjust the focal point when the source aspect ratio is different.

  3. 3

    Review every generated size and its final file size in the browser.

  4. 4

    Download one result or save the complete preset pack as a ZIP file.

Frequently asked questions

Is Slack Emoji Resizer free?

Yes. The tool runs in your browser and does not require an account.

Are uploaded images stored?

No. Image resizing and export happen locally in your browser.

Which format does this Slack tool export?

The default export is PNG, selected for compatibility with this asset type.

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