Guide

Get the thumbnail into the right frame before upload.

Thumbnail prep is easier when the crop, aspect ratio, and export happen before the rest of the publishing rush.

Use OpenToolsKit's thumbnail resizer when a draft image needs a cleaner video-ready frame.

The frame shape changes the image fast

A thumbnail can look fine in a square editor and still feel wrong in a wide frame.

That is why the canvas should match the destination early.

Crop with the focal point in mind

The most important part of the image should remain clear after the resize.

Previewing the frame early helps protect that focal point.

Keep the export workflow simple

A quick dedicated preset is usually enough for the first pass.

The value is speed and clarity, not design-system complexity.

Workflow support

Keep the surrounding workflow attached to the guide.

Collections compare the best route for the job, while packs connect the wider multi-step workflow that usually follows.

FAQ

Short answers that keep the workflow moving.

Can I use JPG or PNG for the thumbnail?

Yes. Both can work depending on the image and workflow.

Does this design the thumbnail for me?

No. It prepares the image for the target canvas.