Question 1

Does Microsoft Teams require custom emoji to be 128×128 pixels?

Accepted Answer

No. Microsoft currently recommends square images and files under 256K but does not publish an exact pixel requirement on its custom emoji support page. This tool uses 128×128 as a practical default for small chat emoji.

Question 2

Which file types does this Teams emoji resizer support?

Accepted Answer

This V1 processes static PNG, JPG/JPEG, and WebP images and exports PNG. Microsoft Teams itself also accepts GIF, but animated GIF resizing is intentionally excluded here so animation is never silently lost.

Question 3

Are my images uploaded?

Accepted Answer

No. Image decoding, resizing, preview, and PNG export happen locally in your browser.

Question 4

Why is the Add emoji option missing in Teams?

Accepted Answer

Teams administrators can restrict who is allowed to create custom emoji. A missing upload option may be an organization policy issue rather than an image-size problem.