How do I validate my Open Graph and Twitter Card meta tags?

CodeFrog validates the following meta tags:

• Open Graph: og:title, og:description, og:image, og:url
• Twitter Card: twitter:card, twitter:title, twitter:description, twitter:image

CodeFrog checks for required tags, validates image dimensions (recommended 1200×630 for OG, 1200×675 for Twitter), and flags character limit issues. Works on localhost — fix your social sharing previews before your site goes live.