Missing tag checks
Find missing og:title, og:type, og:image, og:url, meta description, canonical and twitter:card fields before a link goes live.
Free Open Graph Tag Checker
Open Graph Tag Checker for social preview tags before a page is shared
Paste a page head, HTML snippet, or manual social fields into the Open Graph Tag Checker to find missing Open Graph tags, Twitter Card gaps, duplicate tags, image URL issues, canonical problems, and preview length risks without fetching the URL.
Browser-side social tag audit
Paste tags into the Open Graph Tag Checker
The Open Graph Tag Checker reads pasted HTML and optional manual fields, then checks the tags that shape Facebook, LinkedIn, X and Discord previews. It does not crawl a live URL, so the first version avoids CORS and crawler-access surprises.
Your HTML and tags stay in this browser tab. The Open Graph Tag Checker does not fetch the URL or upload pasted content.
Open Graph Tag Checker manual fields
Use these fields when you only have the values, or to override what the pasted HTML contains.
Open Graph Tag Checker results will appear here
Paste a head snippet or fill in manual fields to see missing tags, length warnings, duplicate tags, image URL checks, platform readiness and a simulated share card.
Open Graph Tag Checker summary
Missing
0
Warnings
0
Passed
0
Open Graph Tag Checker issues
Open Graph Tag Checker platform preview fit
Open Graph Tag Checker simulated share card
No image URL for the simulated share card
example.com
How the Open Graph Tag Checker finds social preview problems
The Open Graph Tag Checker focuses on tags you can actually inspect from pasted HTML: required Open Graph metadata, Twitter Card coverage, duplicate tags, canonical signals and practical preview length checks.
Open Graph Tag Checker HTML parsing
Paste a full HTML document, a head section, or only meta tags. The Open Graph Tag Checker extracts title, description, og:title, og:description, og:image, og:url, twitter:card and canonical values locally.
Open Graph Tag Checker platform review
The Open Graph Tag Checker groups results by missing fields, warnings and passed checks, then summarizes fit for Facebook, LinkedIn, X and Discord without claiming platform approval.
Open Graph Tag Checker share preview
The Open Graph Tag Checker builds a simulated share card from the best title, description, page URL and image URL it can find, so you can spot thin copy, missing images or the wrong canonical target.
Open Graph Tag Checker features for publishing workflows
Use the Open Graph Tag Checker when a page preview looks wrong in social posts, chat apps, CMS previews or launch QA.
Length warnings
Review titles that may truncate and descriptions that are too short or too long for clear social preview copy.
Duplicate tag detection
Detect duplicate social tags that could make crawlers choose a different title, description, image or canonical URL than expected.
Image URL review
Check whether og:image and twitter:image values are absolute http or https URLs and whether declared dimensions look large enough.
Twitter Card coverage
Confirm that twitter:card is present and that X can fall back to a usable title, description and image when explicit card tags are missing.
Simulated share card
Preview the likely title, description, domain and image URL state without making the browser crawl the live page.
How to use the Open Graph Tag Checker without URL crawling
This Open Graph Tag Checker is built for pasted source and manual inputs, which is more reliable than trying to fetch arbitrary pages from a front-end-only tool.
01
Paste HTML into the Open Graph Tag Checker
Copy the page head, a rendered HTML snippet, or the exact meta tags from your CMS and paste them into the tool. You can also fill manual fields when a developer, marketer or SEO teammate only has the values.
- Works with full HTML, head code or meta tags
- Manual fields override pasted values
02
Review Open Graph Tag Checker warnings
Start with missing og:title, og:type, og:image and og:url, then check meta description, canonical, twitter:card, image URL format, duplicate tags and preview copy length.
The check is a practical preflight. Final rendering can still vary by crawler cache, platform rules, blocked images and page accessibility.
Review issues 03
Use the Open Graph Tag Checker preview
Compare the simulated card with the intended title, description, domain and image URL. Fix the source tags, clear platform caches when needed, and run the Open Graph Tag Checker again.
If a platform still shows an old preview, use that platform's debugger or cache refresh tool after the source tags are corrected.
Preview cardOpen Graph Tag Checker FAQ
Answers about accuracy, privacy, accepted input, image URLs, platform previews and why this Open Graph Tag Checker does not fetch live URLs.
What does the Open Graph Tag Checker validate?
The Open Graph Tag Checker validates pasted HTML or manual fields for common social preview metadata: title, meta description, og:title, og:type, og:image, og:url, og:description, twitter:card, Twitter Card fallback fields and canonical URL.
Why does the Open Graph Tag Checker not fetch a URL automatically?
A pure front-end URL fetcher often fails because many sites block cross-origin browser requests. This Open Graph Tag Checker is more predictable because it checks HTML or tag values you paste directly.
Can the Open Graph Tag Checker guarantee Facebook, LinkedIn, X or Discord previews?
No. The Open Graph Tag Checker catches common missing, duplicate and risky tags, but each platform may cache previews, apply its own cropping, ignore blocked images or change rendering rules.
Does the Open Graph Tag Checker upload my pasted HTML?
No. The parsing and checks run in your browser tab. The tool does not upload pasted HTML, and it does not crawl the page URL or load remote image URLs for the simulated preview.
Why does the Open Graph Tag Checker flag duplicate tags?
Duplicate tags can create inconsistent previews because crawlers may use the first matching value. The Open Graph protocol allows arrays for some properties, but conflicting title, description, image or canonical tags are worth reviewing.
What should I do when the Open Graph Tag Checker reports an invalid image URL?
Use an absolute http or https URL for og:image and twitter:image, confirm the image is publicly reachable, and prefer a large preview-friendly image such as a 1200 x 630 asset when the platform supports it.
Run the Open Graph Tag Checker before sharing a page
Use the Open Graph Tag Checker during launch QA, CMS editing, SEO reviews and social campaign handoff.
Paste the tags, review missing fields, fix risky preview copy, then copy the report for the person who owns the page.
Free Open Graph Tag Checker for pasted HTML, social meta tags, Twitter Cards, canonical URLs and simulated share previews.