When someone shares your link on social media, the preview image is the first thing people see. A compelling Open Graph image grabs attention, stops the scroll, and drives more clicks. A social media preview generator lets you test exactly how your URL will appear when shared, helping you catch issues before your content goes live.

What Is an Open Graph Image?

Open Graph (OG) is a protocol developed by Facebook that allows web pages to control how they appear when shared on social media.

The og:image meta tag specifies which image platforms such as:

  • Facebook
  • LinkedIn
  • X (formerly Twitter)
  • Slack
  • WhatsApp

use when generating a link preview.

Open Graph Image Size Requirements

  • Facebook — 1200 × 630 px recommended. Images smaller than 600 × 315 px may appear as thumbnails.
  • X (Twitter) — 1200 × 628 px for summary_large_image cards. A 1:1 ratio is used for summary cards.
  • LinkedIn — 1200 × 627 px recommended.
  • WhatsApp — 1200 × 630 px recommended. Square (1:1) images also work well.
  • Slack — Automatically uses the og:image tag. A 1200 × 630 px image is recommended.

Essential Open Graph Meta Tags

Include these tags in the <head> section of your page:

  • og:title — Keep the title under 60 characters.
  • og:description — Keep the description under 160 characters.
  • og:image — Use the full absolute URL to your preview image.
  • og:url — Specify the canonical URL of the page.
  • og:type — Use website for standard pages and article for blog posts.

Twitter Card Meta Tags

X (formerly Twitter) supports its own metadata in addition to Open Graph.

Include the following tags:

  • twitter:card — Use summary_large_image for a large image preview.
  • twitter:title — Page title displayed in the card.
  • twitter:description — Brief page description.
  • twitter:image — Image shown in the Twitter card.

These tags give you greater control over how your content appears when shared on X.

Important: Social media platforms aggressively cache Open Graph metadata. After updating your meta tags, use Facebook’s Sharing Debugger or X’s Card Validator to refresh the cache and preview your latest changes.

How to Use a Social Media Preview Generator

A social media preview generator lets you verify how your webpage will appear across major platforms.

Use it to:

  • Check for missing og:image tags.
  • Verify image dimensions.
  • Test title and description lengths.
  • Detect truncated text.
  • Preview how your content looks before sharing.
  • Ensure metadata is correctly configured.

Fixing these issues before publishing helps maximize click-through rates and improves your content’s appearance across social platforms.

Frequently Asked Questions

Q: Why is my social media preview not showing the correct image?

A: Social platforms cache Open Graph data, sometimes for several days. After updating your og:image tag, use Facebook’s Sharing Debugger or X’s Card Validator to clear the cache and regenerate the preview.

Q: Do I need separate images for each social platform?

A: Not necessarily. A 1200 × 630 px image works well across Facebook, LinkedIn, WhatsApp, Slack, and X. However, if you want to optimize specifically for square previews or platform-specific layouts, creating multiple image versions can improve presentation.

Q: Can I use the same og:image across my entire website?

A: Yes, you can use a default fallback image for pages without unique visuals. However, important pages such as blog posts, landing pages, and product pages should have custom Open Graph images that reflect their specific content. Custom images generally achieve higher engagement than generic branded graphics.

Q: Why is my Open Graph image showing as a small thumbnail?

A: This usually happens because the image is too small. Facebook displays images smaller than 600 × 315 px as thumbnails. For the best results, use an image that is at least 1200 × 630 px and ensure the image URL is publicly accessible.

Q: Does the Open Graph image affect SEO?

A: Open Graph images are not a direct ranking factor for search engines. However, attractive social media previews can significantly improve click-through rates and increase traffic to your website, indirectly supporting your overall SEO performance.