There are four current types of Twitter/X Cards: summary, summary_large_image, player, and app. The summary card shows a small thumbnail alongside your title and description; summary_large_image displays a large hero image above the text and is what most publishers use for link previews; player embeds inline audio or video; app links directly to an iOS/Android app listing. All META tag name attributes are prefixed with twitter:, and that hasn’t changed since the platform’s 2023 rebrand from Twitter to X — X still reads the same twitter:-prefixed tags.
META tags you would use in all card cases include:
Each of these items gets its own META tag, so the Twitter Card META tags for this page would look like this:
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:url" content="https://postrss.com">
<meta name="twitter:title" content="How To Post a Link on Twitter With Image">
<meta name="twitter:description" content="How To Post a Link on Twitter With Image.">
<meta name="twitter:image:src" content="https://postrss.com/wp-content/uploads/2014/01/mainslide1.jpg">Source code for WordPress tags for Twitter for showing an image alongside links at posts:
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:url" content="<?php echo get_permalink($ID); ?>">
<meta name="twitter:title" content="<?php echo get_the_title($ID); ?>">
<meta name="twitter:description" content="<?php echo mb_substr($content,0,120); ?>">
<meta name="twitter:image:src" content="<?php $ID = $wp_query->post->ID; $image = wp_get_attachment_image_src( get_post_thumbnail_id( $ID ),'full'); echo $image[0]; ?>">X retired its official Card Validator tool in 2022, so there’s no first-party way to preview a card without actually posting it. The most reliable check is to post the link on X yourself (a draft or unlisted post works if your account/workflow allows one) and look at the rendered preview directly. Several independent, free card-preview tools are also available online if you’d rather not post a test link publicly — search for “Twitter Card preview tool” and cross-check results against what your page’s own twitter: tags actually say, since third-party tools vary in how current their scraping is.
When PostRSS automatically posts a new article from your RSS feed to X, the platform generates the link preview from whatever twitter: (or fallback Open Graph) tags exist on your page at the moment X’s crawler fetches it. Setting up correct twitter:card, twitter:title, and twitter:image tags on your website using the code above ensures your automated posts also get a proper image preview instead of a bare link.
X will fall back to your Open Graph tags (og:title, og:image, og:description) if dedicated twitter: tags aren’t present, so a page with solid OG tags alone will usually still get a reasonable preview. Adding twitter:card explicitly is what unlocks the larger summary_large_image layout specifically, though, so it’s worth setting even if your OG tags are already in place.
X recommends an image around 1200×675 pixels (roughly a 1.91:1 aspect ratio), similar to Facebook’s Open Graph recommendation, so a single well-sized image can often serve both platforms.
Like Facebook, X caches card data per URL for a period after it’s first scraped. Posting the link again, or waiting for the cache to expire, will typically pick up the updated image.