We added Scan. Paste a URL and see the card the way each platform will draw it, alongside anything worth fixing.
The previews are X, Facebook, LinkedIn, Slack and Discord, because each frames a
shared link differently and a card that reads well in one can read badly in
another. Under them is a plain list of what to change: a missing twitter:card
so X shrinks the image to a square, absent og:image:width, an image that
redirects, a file heavy enough that some platforms refuse it.
Every check is a real request made as that crawler, so the answer is what those services will actually get rather than a cached third party result.
We also fixed Showcase, which threw when its optional accent prop was left
out. The documented example renders again.
Both contributed by @bhaumikmistry.