Link preview generator
Rendered in your browser · nothing is uploaded
Compose a link preview card and see it rendered. The card comes from four tags; og:title, og:description, og:image and og:url, which you add to the page’s head.
How to use the link preview generator
A link preview is generated by the platform scraping your page, not by anything you upload, which is why you cannot fix a bad preview by re-posting. The four Open Graph tags are the entire mechanism, and they go in the head of the page being linked to. Two practical points: the scraper needs to be able to reach the page, so a link behind a login or a robots.txt block gets no preview at all, and single-page apps that set the tags with JavaScript often get nothing, because most scrapers do not run scripts. Server-render the tags.
Questions
Add og:title, og:description, og:image and og:url to the head of the page being linked to.
Most scrapers do not run JavaScript. The tags have to be in the server-rendered HTML.
No. The platform scrapes the destination, so it has to come from there.
The scraper cannot reach it. Anything behind a login or blocked in robots.txt gets no preview.
No, and it cannot be. Platforms cut by rendered pixel width, so a title in capitals or wide letters cuts earlier than a character count suggests. Treat the limit as a guide and leave a few characters of margin.