No. It is a simple side-by-side mock: image, title, channel, and a view count you type.

Are the images uploaded?

No. They stay in this browser as local previews.

Can I judge the safe area for Shorts?

Only by eye. Fill crops to 16:9. Fit shows the whole image. This page does not overlay a platform’s UI chrome.

Thumbnail A/B Preview

Compare two stills in a 16:9 frame, cropped or fitted. Nothing is uploaded.

Compare two stills in a plain 16:9 frame. Fill crops the image to the frame. Fit shows the whole image with empty space. The title, channel, and view count are placeholders. Nothing is uploaded.

TitleChannelViewsFrame

Thumbnail AClick to browse

Thumbnail BClick to browse

Thumbnail A

Saturday build log

Nice Tools · 12K views

Thumbnail B

Saturday build log

Nice Tools · 12K views

Worked example

Upload two stills, set the title to “Saturday build log”, the channel to “Nice Tools”, and the views to “12K”. The two cards show the same caption under different images so you can compare the crop.

FAQ

Is this a real feed?: No. It is a simple side-by-side mock: image, title, channel, and a view count you type.
Are the images uploaded?: No. They stay in this browser as local previews.
Can I judge the safe area for Shorts?: Only by eye. Fill crops to 16:9. Fit shows the whole image. This page does not overlay a platform’s UI chrome.