Twitter is dropping the crop on web. This is the same update that banished Twitter’s awkward auto-cropping algorithm on its Android and iOS apps, which means that you’ll see images in their entirety on your timeline as you scroll through Twitter on your web browser.

You will now see an accurate preview of your image that isn't oddly styled when you publish it. The full-size preview pane on the platform is marketed as a "what you see is what you get" look at your content.