Question 1

How do the preset sizes help?

Accepted Answer

Presets match common social and marketing formats so you can set the canvas size with one click.

Question 2

What does cover versus contain mean?

Accepted Answer

Cover fills the canvas and crops the excess, while Contain fits the full image inside and adds background padding.

Question 3

Can I add rounded corners?

Accepted Answer

Set a corner radius to generate thumbnails with rounded edges ready for use.

Question 4

Which format should I export?

Accepted Answer

PNG preserves transparency, JPEG keeps photo sizes small and WebP delivers the smallest files for modern browsers.

Question 5

Is processing local?

Accepted Answer

Yes—thumbnail generation runs locally and your image never leaves your device.

Question 6

How do I keep file sizes small?

Accepted Answer

Use WebP or JPEG with a lower quality setting and smaller canvas dimensions to reduce filesize.

Thumbnail Generator

Thumbnail creation FAQs