Open Graph Meta Tags: How to Control Your Social Media Previews
What Open Graph Does
Open Graph (OG) is a protocol created by Facebook that standardizes how web pages present themselves when shared on social media. Every major platform — Facebook, LinkedIn, Slack, WhatsApp, Discord — reads OG tags to render link previews. Without proper OG tags, platforms fall back to guessing — often with poor results.
The Four Essential OG Tags
og:title — the headline shown in the preview card (70 char max). og:description — the supporting text (200 char max). og:image — the thumbnail image (1200×630px recommended, min 600×315px). og:url — the canonical URL for this page (prevents duplicate previews when pages are accessed via multiple URLs).
Image Requirements by Platform
Facebook: 1200×630px minimum, < 8MB, JPG or PNG. LinkedIn: 1200×627px preferred. Twitter (X): For summary_large_image, 1200×628px. Images smaller than minimum are shown as tiny thumbnails or ignored. Always test with each platform's card validator before deploying.
Frequently Asked Questions
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