Util Tools What Open Graph tags do
Open Graph (OG) tags are HTML meta tags that tell social platforms how to display your link when it is shared: the title, description, and preview image. Enter any URL and this checker fetches its OG and Twitter Card tags, previews the resulting share card, and lists exactly which recommended tags are missing.
Why a link preview looks wrong
When a shared link shows the wrong title, no image, or stale content, the cause is almost always the OG tags: they are missing, point to a broken image, or were cached by the platform before you updated them. Social networks cache aggressively, so after fixing your tags you often need to ask the platform to re-scrape the URL (for example with Facebook's Sharing Debugger) before the new preview appears.
The ideal image and text sizes
The recommended og:image is 1200 by 630 pixels (a 1.91:1 ratio), which displays cleanly as a large card on most platforms without awkward cropping. Keep og:title concise (around 60 characters or fewer) and og:description to roughly one or two sentences, since long values get truncated in the card.
Do you need both OG and Twitter tags?
Open Graph is read by Facebook, LinkedIn, and many others, and X (Twitter) will fall back to OG tags if no Twitter Card tags are present. So at minimum, set complete OG tags. Adding the Twitter-specific tags (twitter:card, twitter:image) gives you finer control over how the card looks on X. This checker shows what each platform will use and what is absent.
최종 업데이트: 2026년 9월