Which width should I use?

Match your theme's content width; 1200 px covers most blogs. For full-width hero images use the 1920×1080 preset.

Will WordPress still generate thumbnails?

Yes, from your optimized WebP, so the thumbnails are small too.

1

JPG, PNG, WebP, AVIF; one or a hundred at once.

2

Choose a platform preset or enter width, height and the KB range you need.

3

Every file lands inside the range, correctly sized and named. ZIP, individual or straight to a folder.

You say 100–200 KB; the tool finds the quality for each image. A minimum keeps simple images from being over-compressed.

Processing happens in your browser with WebAssembly. Nothing is uploaded, so there is no queue, no size cap and no data retention.

WooCommerce, Shopify, WordPress, Open Graph, Instagram, classifieds. Add your own in Pro.

Which width should I use?: Match your theme's content width; 1200 px covers most blogs. For full-width hero images use the 1920×1080 preset.
Will WordPress still generate thumbnails?: Yes, from your optimized WebP, so the thumbnails are small too.
Is WebP supported by WordPress?: Natively since 5.8 (2021).