Use this Open Graph checker to test OG tags, the first og:image, and Twitter metadata from one public URL. The report shows measured evidence for social preview issues, not a score.
Maintained by Icon Checker
Public HTML is fetched through a constrained audit service. The browser never loads the third-party og:image URL.
Open Graph checker
Remote URL audit
The report keeps protocol OG tags, HTML fallbacks, Twitter metadata, and the first og:image as separate evidence.
Final HTML and OG tags
Redirected page, tag order, duplicates, empty values, and raw content
Effective metadata
OG values versus HTML fallback, plus Twitter evidence without a pass or fail
First og:image evidence
HTTP, format, size, ratio, and a 1.91:1 social preview when the file is inlined
An Open Graph checker audits the share tags a crawler can read without executing JavaScript. Use it before publishing a page when you need to know which OG tags are in the public HTML, which value is effective, and whether the first og:image can actually be fetched.
This Open Graph checker measures the final HTML, the first valid og:image, and the difference between Open Graph values and HTML fallbacks. Relative, data, and javascript image URLs stay in evidence. They are not silently rewritten into fetch targets.
It is not a Facebook, LinkedIn, Slack, or X simulator. A social preview card on this page is a 1.91:1 evidence view, not a promise that any network will render the same crop.
A pass means the fetched evidence met the deterministic Open Graph rules. It does not promise that Facebook, LinkedIn, Slack, or X will display the social preview. Twitter metadata is shown as evidence only and never enters the automated summary.
| Check | Evidence | Kept separate |
|---|---|---|
| OG tags | og:title, og:type, og:image, og:url | HTML fallback |
| First og:image | HTTP, MIME, bytes, format, dimensions, ratio | Later og:image tags |
| Social preview | 1.91:1 card from effective Open Graph values | Platform pixel simulation |
| X / Twitter | Declared twitter:* values | Automated pass/fail |
Test the live public URL, not a local HTML file, a pasted fragment, or a raw image URL. The Open Graph checker only reads what a remote crawler can request from the final document.
Use the canonical https:// page you want to inspect. The Open Graph checker rejects credentials, private network targets, unsafe ports, and unsupported protocols.
The audit follows allowed redirects, parses Open Graph tags in order, then fetches only the first valid og:image within fixed time and size limits.
Replace missing OG tags, publish the og:image file, then re-run the Open Graph checker. Treat warnings, Twitter evidence, and manual crop review separately.
Copy only the missing OG tags. Replace placeholder text before publishing, and keep image URLs absolute. The Open Graph checker reports raw tag order, including duplicates and empty values, so do not treat example markup as already fixed.
These four OG tags are required by the Open Graph protocol. HTML title and description cannot satisfy them.
HTML head
<meta property="og:title" content="Page title">
<meta property="og:type" content="website">
<meta property="og:image" content="https://example.com/og.png">
<meta property="og:url" content="https://example.com/page">Declare an absolute og:image and matching type, size, and alt. The Open Graph checker binds these fields to the first image root.
HTML head
<meta property="og:image" content="https://example.com/og.png">
<meta property="og:image:type" content="image/png">
<meta property="og:image:width" content="1200">
<meta property="og:image:height" content="630">
<meta property="og:image:alt" content="Share image description">Fix deterministic protocol and og:image failures first. Warnings, manual preview judgment, and partial reports mark uncertainty, not hidden passes.
| Result | What it means | What to do next |
|---|---|---|
| Pass | Fetched evidence met a deterministic Open Graph rule. | Keep the measured value; it is not a display guarantee. |
| Fail | A required OG tag is missing, illegal, or the first og:image is proven unavailable. | Open the finding, apply the fix markup, publish, and test the URL again. |
| Warning | A recommendation, consistency issue, or incomplete declaration. | Review og:description, image alt, ratio, or URL mismatch before release. |
| Partial | Timeout or byte limits stopped image evidence. | Recheck the og:image host; do not treat missing bytes as a 404. |
| Manual | Title, description, and crop still need a person. | Inspect the 1.91:1 social preview on this page. |
Most social preview issues come from missing OG tags, a relative og:image, or a first image that does not return 2xx. Treat HTML fallback and Twitter tags as clues, not as Open Graph passes.
Add a non-empty og:title. HTML title is only a fallback and does not satisfy the Open Graph protocol rule.
Recommended markup
<meta property="og:title" content="Page title">Use an absolute https URL for og:image. Relative, data, and javascript URLs stay in collected tags and are not fetched.
Recommended markup
<meta property="og:image" content="https://example.com/og.png">Publish the file at the declared URL. A 404 is complete fail evidence, not a partial timeout.
Export at least 200 x 200, prefer 1200 x 630, and keep the ratio near 1.91:1. Update og:image:width and og:image:height so they match the measured file.
Fix the live OG tags and og:image first. This Open Graph checker does not clear Facebook, LinkedIn, Slack, Discord, or X caches.
The Open Graph checker measures the first og:image file, not the filename. Meta requires at least 200 x 200 pixels. 600 x 315 is recommended for large display, and 1200 x 630 is recommended for HiDPI. The share preview ratio should stay within 1.91:1 plus or minus 0.05.
Files above 8 MiB fail the byte limit. A valid PNG, JPEG, GIF, or WebP larger than 1 MiB can still be audited, but the report omits the inline social preview. SVG is recorded as evidence and is not rendered.
| Open Graph image rule | Measured bar | Outcome |
|---|---|---|
| Minimum size | 200 x 200 | Below this is a fail |
| Large display | 600 x 315 | Below this is a warning |
| HiDPI social preview | 1200 x 630 | Below this is a warning |
| Ratio | 1.91:1 ± 0.05 | Outside the band is a warning |
| File size | 8 MiB maximum | Larger files fail; 1 MiB omits preview |
Login walls, cookies, JavaScript-only OG tags, blocked agents, or regional HTML make this Open Graph checker return a fatal problem or partial image evidence.
The fetcher has no database or internal bindings. It rejects credentials, private networks, unsafe ports, loops, oversized HTML or og:image bodies, and expired deadlines. Your browser does not request the third-party image URL.
Rules were reviewed on August 29, 2026 and carry stable IDs in every Open Graph checker report.
The Open Graph protocol defines og:title, og:type, og:image, and og:url. Meta documents share-image minimums, large-display size, HiDPI size, and the 8 MB image guidance this checker interprets as 8 MiB.
Answers stay scoped to OG tags, social preview evidence, and the first og:image.
Website icons are a different job from Open Graph tags and social preview images. Keep this page for OG tags; use Favicon Checker when the question is the tab, search, or touch icon package.
A favicon is a website icon package, not Open Graph tags or a social preview image. Audit tab, search, Apple touch, and manifest icons from a public URL.
Open Favicon Checker