Enter a page URL to preview its share card on X, LinkedIn, Facebook, Slack and Discord, built from its Open Graph and X tags and each platform's fallbacks. We load the share image to check its size, ratio and file weight, and list every missing tag. Free, no account needed.
Every platform builds its link preview from the same handful of tags, and each falls back differently when one is missing. The report shows exactly which tag each platform uses.
A card for each platform with the title, description, image and domain it would show. Under each card, the tag each part came from, so you can see where a platform fell back to your <title> or meta description.
The og:image and twitter:image actually loaded, with their size in pixels, aspect ratio, file format and weight. Platforms crop to about 1.91:1, and X and LinkedIn reject files over 5 MB.
Every og:, twitter:, fb: and article: tag exactly as written, so you can spot duplicates, typos and tags written with name= instead of property=.
Each issue with its fix: missing required tags, relative or http image URLs, images that are too small, the wrong shape or too heavy, an invalid twitter:card, and og:url disagreeing with the canonical.
Use the exact URL people will share. If it redirects, we check the page it lands on, as platforms do.
Open Graph (og:), X (twitter:), and the page's title, meta description, theme colour and canonical, which platforms use as fallbacks.
The image is fetched through our protected connection, up to 8 MB, measured, and resized into a small preview. Your browser never contacts the image's server.
Using each platform's own order of fallbacks: for example, X uses twitter:title, then og:title, then the page title.
The TaskGlaze site audit flags missing og:title, og:description, og:image and og:url tags across every page of your site. See the site audit.
Five tags cover almost every platform. Add them to every page you want people to share.
og:title, og:type, og:image and og:url are the Open Graph basics. Add og:description and og:site_name too; chat apps show both.
That size and its 1.91:1 ratio display well everywhere. Keep important text away from the edges, because some platforms crop to 2:1 or square.
og:image and og:url must include https:// and the domain. Relative paths aren't resolved by several platforms.
Use summary_large_image for a big image card. X falls back to your Open Graph title, description and image, so you rarely need the other twitter: tags.
og:title can be more conversational than your SEO title. Keep it under about 70 characters so it isn't cut off in feeds.
Point og:url at the page's canonical URL so shares of every variant count towards one page.
Add og:image:alt so people using screen readers know what the image shows.
Platforms cache previews. After updating tags, use each platform's own preview refresh, or share a URL with a harmless query string to test.
Each platform reads tags in its own order. When a tag is missing, it falls back to the next one.
| Platform | Title, then fallbacks | Image and size |
|---|---|---|
| og:title, then <title> | og:image; 1200 × 630 recommended, at least 200 × 200 | |
| og:title, then <title> | og:image; 1200 × 627 recommended, under 5 MB | |
| X | twitter:title, then og:title, then <title> | twitter:image, then og:image; 2:1 for summary_large_image, at least 300 × 157 |
| Slack | og:title, then twitter:title, then <title> | og:image, then twitter:image |
| Discord | og:title, then twitter:title, then <title> | og:image; theme-color sets the card's side bar |
Links show no picture, or one the platform picks from the page, often a logo or an ad.
og:image="/images/share.png" works in a browser but not for several platforms. Use the full https:// URL.
Small images appear as a tiny thumbnail beside the text; tall or square images are cropped, cutting off text.
Social platforms don't show SVG images. Export a PNG or JPEG.
Images over 5 MB are rejected by X and LinkedIn. Compress them; 200 to 500 KB is plenty.
A template that hard-codes the site name makes every shared link look identical.
The Open Graph standard uses property=. Some platforms accept both, others ignore name=.
Platforms read the HTML your server sends and don't run scripts, so tags added later are never seen.
Tags, images, fallbacks and caching.
An Open Graph checker reads the tags a page uses to describe itself when shared, and shows how the link preview will look. This one previews five platforms, loads the share image to measure it, and lists every missing or broken tag.
Meta tags such as og:title, og:description and og:image in a page's <head>. Social networks and chat apps read them to build the card that appears when someone shares the link.
1200 × 630 pixels, a 1.91:1 ratio, works on every major platform. Facebook ignores images smaller than 200 × 200, and X needs at least 300 × 157 for its large card.
Mostly no. X falls back to og:title, og:description and og:image. Add twitter:card to choose the card style, ideally summary_large_image.
Platforms cache previews, sometimes for days. Use the platform's own preview or debug tool to refresh it, or test with a URL that has a harmless query string added.
The platform fell back because a tag was missing, empty or added by JavaScript. The report shows the source of every part of each card.
Not directly. Search engines don't rank pages by their Open Graph tags. Good previews do earn more clicks and shares, which brings visits and links.
It tells platforms the canonical address of the page, so likes and shares of different variants count together. Set it to the same URL as your canonical tag.
Platforms redesign their cards and crop differently on different screens. The previews follow each platform's current layout and fallback order, and the image measurements are exact.
The image is fetched by our server through a protected connection, size-limited, and re-encoded into a small preview. Your browser never connects to the image's server.
Three per tool per day without an account, or fifteen per tool per day when you are signed in to your TaskGlaze account. Each free tool has its own count.
We check every link against public lists of phishing and scam sites before loading it, and refuse ones that look unsafe. A refused link doesn't use one of your daily checks.
More free checks from TaskGlaze, with the same daily allowance for each tool.
The TaskGlaze site audit flags missing Open Graph tags across your whole site, alongside every other on-page check.