Free Tool

OG Image Checker

Q: Does this tool check Twitter Card tags?

Yes. The tool reads both Open Graph tags (og:title, og:description, og:image) and Twitter-specific tags (twitter:card, twitter:title, twitter:image). The Twitter preview shows how your link will appear on X/Twitter, including whether you get a large image card or a small thumbnail.

An OG image checker validates the Open Graph meta tags on any URL and previews how the page appears when shared on Twitter, Facebook, LinkedIn, and Slack. OverlayQA's free OG image checker fetches og:title, og:description, og:image, og:url, and Twitter Card tags, then displays platform-accurate share previews with character counts and image dimension checks. No account required.

What Are Open Graph Tags?

Open Graph tags are HTML meta tags that control how a URL appears when shared on social platforms. Facebook created the protocol in 2010. Twitter, LinkedIn, Slack, Discord, and iMessage all read the same tags. The four core tags are og:title, og:description, og:image, and og:url. Without them, platforms guess from the page's title and body text with unpredictable results.

How to Check OG Tags

Enter your URL. Paste any publicly accessible URL into the input field.
Click Check. The tool fetches meta tags from the page's HTML head section.
Review platform previews. See how your link appears on Twitter/X, Facebook, LinkedIn, and Slack.
Fix reported issues. Address missing tags, character limit warnings, and image dimension problems. Re-check to verify.

Recommended OG Image Sizes

Platform	Recommended	Minimum	Max file size
Facebook	1200 x 630 px	200 x 200 px	8 MB
Twitter	1200 x 628 px	300 x 157 px	5 MB
LinkedIn	1200 x 627 px	1200 x 627 px	5 MB
Slack	1200 x 630 px	250 x 250 px	No limit

Common OG Tag Mistakes

Relative image URLs. og:image must be an absolute URL starting with https://. A relative path like /images/og.png returns nothing on any platform.
Stale Facebook cache. Facebook caches OG data aggressively. After updating tags, clear the cache at Facebook's Sharing Debugger.
Missing twitter:card. Without this tag, Twitter shows a small square thumbnail. Add twitter:card="summary_large_image" for a full-width preview.
Title or description too long. Facebook truncates titles after 60 characters and descriptions after 155. Write within these limits.
Images behind authentication. Social crawlers cannot log in. If your image URL requires a cookie or token, the preview shows a blank.
Wrong image dimensions. A square logo served as the OG image gets cropped or padded. Design a dedicated image at 1200x630.

Frequently Asked Questions

Is this OG image checker free? Yes. Paste any URL and check as many pages as you need. No account, no login, no usage limits.

What are Open Graph tags? Open Graph tags are HTML meta tags that control how a URL appears when shared on social platforms. Facebook created the standard in 2010. Twitter, LinkedIn, Slack, Discord, and iMessage all read the same tags. The four core tags are og:title, og:description, og:image, and og:url.

What is the ideal OG image size? The standard is 1200 x 630 pixels (1.91:1 aspect ratio). This size displays without cropping on Facebook, Twitter, LinkedIn, and Slack. Use PNG or WebP for images with text overlays. Keep the file under 5 MB.

Why is my OG image not showing when I share? The three most common causes: the og:image URL is relative instead of absolute (must start with https://), the image is behind authentication or a CDN that blocks crawlers, or the platform has cached an older version of your tags. Clear the cache using Facebook's Sharing Debugger or Twitter's Card Validator.

Does this tool check Twitter Card tags? Yes. The tool reads both Open Graph tags and Twitter-specific tags. The Twitter preview shows how your link will appear on X/Twitter, including whether you get a large image card or a small thumbnail.

Can I test localhost or staging URLs? Staging URLs work if they are publicly accessible. Localhost URLs will not work because the server-side fetch cannot reach your local machine. For local testing, inspect your HTML source directly or use a tunnel service like ngrok.

How do I fix missing OG tags? Add meta tags inside your HTML head section. At minimum, set og:title, og:description, og:image (absolute URL), og:url, and twitter:card. Most frameworks (Next.js, WordPress, Webflow) have built-in fields or plugins for this.

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Last updated June 2026