X card tester
Test a link’s X card: its twitter: tags, its image, and for a player card whether the player route lets X frame it. Or make the player card tags to paste.
Or make the tags
The player is on https with its size given, a still image stands in until it plays, and the player route’s headers let X put it in a frame.
What does it check?
Rules from the rulebook, and how many of the sites mttr has read miss each.
- Set a share imageSet og:image so links to the page carry a picture.70%of sites miss it
Questions
Is there still an official Twitter card validator?
No. X retired its card validator in 2022. Posting the link, or a tester like this one, is how to see what X will show.
Why does X show no card for my link?
The usual causes are robots.txt keeping Twitterbot out, a missing twitter:card or og:image, or an image X cannot fetch. The tester checks each in that order.
What does a player card need?
twitter:card set to player, a player address on https, its width and height, and a player route whose headers let X frame it.
The whole site
One page is one part. A read checks every page against the whole rulebook and says what to fix first.
Read a whole site