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OG Tag Validator

Paste a URL and find out if your Open Graph and Twitter Card tags are set up correctly.

What does this tool do?

This tool checks any URL for Open Graph and Twitter Card meta tags. These tags control how your page looks when shared on Facebook, X (Twitter), LinkedIn, Slack, Discord, and WhatsApp.

You get a full breakdown of what is missing, what is wrong (like a relative image URL), and how your link actually looks when someone shares it.

What does it check?

The validator runs your URL through over 20 individual checks across five categories:

  • General: page title, meta description, og:locale, og:site_name
  • Open Graph: all five required tags (og:title, og:description, og:image, og:url, og:type), absolute URLs, HTTPS, title and description length
  • Image: actual dimensions (fetched from the image), recommended 1200x630 size, file size, HTTPS
  • Twitter Card: card type, title/description/image fallbacks, card-type-specific checks (summary_large_image needs alt text, player cards need player URL and dimensions)
  • Discord: theme-color meta tag that controls the embed border color

How to check your Open Graph tags

Getting started takes about five seconds:

  • Paste your URL into the field above and click Check
  • Review the audit results. Red means something is broken. Yellow means it could be better. Green means it passed.
  • Scroll down to see the social preview card and the full list of meta tags found on your page
  • Click Download Report to save a branded PDF you can share with your team or client

Download a branded PDF report

After running a check, you can download the results as a clean PDF report. The report includes your score summary, all audit results grouped by category, image details, and every meta tag found on the page.

You can customize the report with your own logo, company name, colors, and font before downloading. Great for sending to a client or attaching to a ticket. The report links back to this tool so anyone can re-run the check later.

Why different platforms show different previews

Facebook, X, LinkedIn, Discord, Slack, and WhatsApp all read the same Open Graph tags but each platform crops images differently, truncates titles at different lengths, and has its own layout. For example, Facebook shows a full-width image with a grey background. Discord adds a colored left border from your theme-color tag. WhatsApp squishes everything into a tiny chat bubble. Having all the right tags does not guarantee a perfect preview everywhere, but missing tags will definitely break it. Use our Social Media Preview tool to see how your link looks on each platform. Need to generate the tags from scratch? Try the OG Tag Generator.

Common questions

What are Open Graph tags?

Open Graph tags are HTML meta tags that control how your page title, description, and image appear when someone shares your URL on social media. Without them, platforms just guess what to show. They usually get it wrong.

Which tags are required?

At minimum, you need og:title, og:description, og:image, og:url, and og:type. For Twitter/X, you also want twitter:card set to summary or summary_large_image.

Why is my og:image not showing?

The most common cause is a relative URL. og:image must be an absolute URL starting with https://. The image should also be at least 1200x630 pixels for best results across platforms.

What image size should I use?

1200x630 pixels is the safe choice. It works well on every platform. Keep the file under 300KB if you want it to show up reliably on WhatsApp and mobile. Facebook allows up to 8MB but bigger files load slower.

Do I need separate Twitter Card tags if I already have Open Graph tags?

Twitter falls back to Open Graph tags when its own tags are missing. But you still need twitter:card to tell it which layout to use. Without that tag, Twitter might show a small thumbnail instead of a large image.

How do I fix a cached preview on Facebook?

Facebook caches link previews aggressively. Go to the Facebook Sharing Debugger, paste your URL, and click "Scrape Again." It will fetch the latest tags and update the preview. LinkedIn has a similar tool called Post Inspector.

What is the theme-color meta tag?

Discord reads the theme-color meta tag to set the colored border on the left side of link embeds. It is a standard HTML meta tag, not an Open Graph tag. Set it to a hex color that matches your brand.

Can I download the results as a PDF?

Yes. After running a check, click the Download Report button. You can customize the report with your own logo, colors, and font before saving it. The PDF includes all audit results, image details, and the full list of meta tags. Once you have fixed the issues, check how your link looks on each platform with our Social Media Preview tool.