OpenGraph is the metadata standard that Facebook introduced in 2010 to control how a URL renders when pasted into a social post, chat, or email. Almost every major platform now reads OG tags: Facebook, LinkedIn, Slack, Discord, Telegram, WhatsApp, iMessage, and most email clients. Twitter has its own related but separate Twitter Card metadata, which falls back to OG when Twitter-specific tags are missing. This previewer renders a faithful mockup of the social card that those platforms generate from your tags. You enter the OpenGraph title, description, image URL, and site name, and the tool shows you the rendered card alongside the underlying HTML you should paste into your page head. Get the title under 60 characters and the description under 160 to avoid truncation on most platforms. Use an image at least 1200 by 630 pixels for best results across the platforms that crop large images.
Frequently asked questions
1200 by 630 pixels is the most universal size. Facebook, LinkedIn, and Slack will render it cleanly. Twitter uses 2:1 aspect ratio (1200 by 600) for large image cards. Most platforms gracefully crop or letterbox other sizes, but 1200 by 630 is the safest default.
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