Question 1

What image dimensions should I use for og:image?

Accepted Answer

The recommended minimum size is 1200×630 pixels with an aspect ratio of 1.91:1. Facebook and LinkedIn crop images smaller than that. Use a PNG or JPEG under 8 MB. Avoid putting critical text too close to the edges, as platforms may crop the image slightly for thumbnails.

Question 2

What is the difference between og:type and Twitter card types?

Accepted Answer

og:type describes what kind of content the page is — 'website' for general pages, 'article' for blog posts, 'video.other' for video content. Twitter Cards are a separate system: summary shows a small thumbnail, summary_large_image shows a full-width image, and player embeds video. They are set independently using <meta name="twitter:card">.

Question 3

Can I generate dynamic OG images automatically?

Accepted Answer

Yes. Tools like Vercel's @vercel/og (using the ImageResponse API) and Cloudinary's URL-based transformations let you generate images on-the-fly from text and templates. In Next.js, you can create an opengraph-image.tsx route that renders React to a PNG image at request time using the Edge runtime.

Question 4

Why does og:url matter and how should it match canonical?

Accepted Answer

og:url tells social platforms which URL to associate the share card with, preventing duplicate card counts when a page is accessed from multiple URLs (e.g. with/without trailing slashes or UTM parameters). It should exactly match the <link rel="canonical"> URL to signal the authoritative address of the page.

Question 5

Why isn't my OG image updating after I changed it?

Accepted Answer

Social platforms aggressively cache OG metadata. Facebook caches for up to 7 days; Twitter/X for shorter periods. To force a refresh: use the Facebook Sharing Debugger (developers.facebook.com/tools/debug) or Twitter Card Validator to scrape and update the cache. Changing the image URL (e.g. adding a cache-bust query string) forces platforms to re-fetch immediately.

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