What is an Open Graph checker?
Open Graph is a protocol developed by Facebook that lets any web page control how it appears when shared on social networks: Facebook, LinkedIn, WhatsApp, Slack… The og:title, og:description and og:image tags respectively define the title, summary and image that appear in the preview card. Twitter Cards work on the same principle, with their own twitter:title, twitter:description and twitter:image tags.
The Twaino Open Graph checker analyzes any URL, reads all of these tags and generates a visual preview faithful to what your visitors will see when sharing. Free, no sign-up required, usable without limits.
Level: 🟢 Accessible to everyone · Price: 💸 100% free · Usage: 🌐 Online, no installation
How to use the Open Graph checker
Paste the address of the page to analyze into the input field above.
The tool retrieves the page’s HTML code and extracts all the Open Graph and Twitter Card tags present.
Each tag found is displayed with its exact value: title, description, image, type, canonical URL…
A simulated rendering shows you exactly how the card will look when shared on social networks.
How does the check work?
When you share a link on Facebook, LinkedIn or X (Twitter), the platform sends a scraper bot to read the <head> code of your page in order to extract the Open Graph tags. That is exactly what our tool does. It analyzes several key elements:
- The essential Open Graph tags:
og:title,og:description,og:image,og:url,og:type. - The Twitter Card tags:
twitter:card,twitter:title,twitter:description,twitter:image. - The presence or absence of each tag, clearly flagged to identify what is missing.
- The compliance of the values: title length, image format, valid URL.
The result: in just a few seconds you know whether your page is correctly set up for social networks, without opening the source code or using the platforms’ native debugging tools.
💡 Our advice
If the preview shows the site’s generic title rather than the page’s, it is often a sign that the Open Graph tags are missing or misconfigured. Systematically check every newly published page before sharing it on social networks — a poor share card can cut your click-through rate in half.
Why take care of your Open Graph tags?
Open Graph tags directly influence the click-through rate of your social shares. A page without an og:image or with a truncated title loses appeal at the precise moment it has the best chance of being seen. Here is what you stand to gain by optimizing them:
| ✅ Impact on visibility | 🎯 Impact on SEO |
|---|---|
| • More attractive share card • Better click-through rate on social networks • Controlled image across all platforms |
• Social signals consistent with the content • Less bounce from social networks • Reinforcement of the page’s perceived authority |
Open Graph tags are an integral part of a complete on-page SEO audit. Neglecting them is like taking care of a page’s ranking while leaving its social showcase to fend for itself. To go further in the technical analysis of your site, explore the entire suite of free SEO tools from Twaino.
+40%
average engagement for content shared with a well-configured Open Graph image, according to several social media studies
The most common Open Graph mistakes
The Open Graph checker is especially useful for tracking down common mistakes that go unnoticed during simple browsing of the site:
- Missing tags: the page contains no
og:tag at all. The social network then generates a random preview, often unflattering. - Missing or inaccessible image: the image URL is incorrect, or the image is blocked by a
robots.txtfile. - Title too long: beyond 60 to 70 characters, the title is cut off in the share preview.
- Missing description: without an
og:description, the platform picks any text from the page. - Duplicate tags: several
og:titletags present in the same<head>, a source of unpredictable behavior.
For strategic pages — blog articles, product pages, service pages — also remember to check the rendering with the rich results tester to cover all of Google’s enriched display formats.
✅ Key takeaway
The Twaino Open Graph checker reads a page’s og: and twitter: tags, lists them with their values and generates a preview of the rendering when shared on social media. An essential check before any distribution on social networks, free and doable in just a few seconds.
Frequently asked questions
Is the Open Graph checker free?
Yes, the tool is completely free and requires no sign-up. You can analyze as many URLs as you like with no limitation. It is part of the suite of freely accessible SEO tools offered by Twaino.
What is the difference between Open Graph tags and Twitter Cards?
Open Graph tags (og: prefix) were created by Facebook and are recognized by most social networks: Facebook, LinkedIn, WhatsApp, Slack… Twitter Cards (twitter: prefix) are specific to X (formerly Twitter) and let you define enriched card formats. When the Twitter Card tags are absent, X falls back to the Open Graph tags. It is recommended to fill in both for optimal display across all platforms.
What image dimensions are recommended for the og:image tags?
The size recommended by Facebook and LinkedIn is 1200 x 630 pixels, with a 1.91:1 ratio. Below 600 pixels wide, the image may not display as a large card. The file should not exceed 8 MB and must be publicly accessible, with no crawl restriction in the robots.txt.
Why doesn’t the Facebook preview update after a fix?
Facebook caches a page’s Open Graph information. After fixing your tags, you must force the update via Facebook’s official debugging tool (Sharing Debugger). Simply enter the URL and click “Scrape Again” to invalidate the cache and display the new values.
Do Open Graph tags have a direct impact on Google rankings?
Google does not use Open Graph tags as a direct ranking factor. However, they indirectly influence SEO: a well-crafted share card generates more clicks from social networks, which increases traffic and engagement signals on the page. They also contribute to the consistency of the page’s metadata, a point checked during a complete SEO audit.