Open Graph Tags — Complete Developer Guide
You've spent days building a feature. You share the link on Slack, Discord, or LinkedIn — and the preview is a blank box with a URL. No image, no title, no description. It looks broken, and people scroll past without clicking. Open Graph tags are the fix. They are a small set of <meta> tags in your page's <head> that control exactly how your URL looks when it's shared on social networks, messaging apps, and any platform that generates link previews. Get them right and your links stand out. Get them wrong — or omit them — and you're invisible. This guide covers everything: what every OG property does, complete tag sets for different page types, Twitter Card integration, how to debug previews, and best practices for image sizes, character limits, and dynamic OG generation in single-page apps. If you want to preview your tags immediately as you build them, use DevToolkit's OG Image Preview tool — paste any URL and see exactly what it renders on each platform. What Are Open Graph Tags? Ope
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