Google ignores your structured data when it’s broken.
You won’t get rich results, and you’ll miss free traffic.
Schema Checker is a free browser-based tool that validates structured data against schema.org rules. It checks JSON-LD, Microdata, or RDFa markup and tells you if Google can read it or if it’s broken beyond repair.
What Is a Schema Checker?
Schema Checker is a free browser-based tool that scans your page’s schema markup and highlights errors, warnings, and unsupported types. You paste the URL or code, and it tells you exactly what’s wrong — no login needed.
It supports all major schema types: Article, Product, Event, FAQ, How-to, and more.
If it’s not in schema.org, the tool flags it.
Why It Matters for SEO
Bad schema means no rich snippets.
No rich snippets mean less visibility and lower click-through rates.
Google tested rich results across 100 queries and found they took up to 35% of page one clicks. If your schema’s broken, those clicks go to competitors.
The real issue is most people assume their schema works because the page renders. That’s not how Google sees it.
Here’s what actually happens: you add FAQ schema, but one missing comma turns it into gibberish for Google. No error shows on the page. You think it’s live. It’s not.
Google recrawls most sites every 3-7 days, so broken markup can cost you weeks of missed traffic.
How to Use It
- Go to https://scrawl.tools/tools/schema-checker (no login needed)
- Paste your URL or schema code into the box
- Click “Check” and review the results
It takes under 10 seconds.
The tool is free, and you don’t need to sign up.
What the Results Tell You
You see a clean breakdown: valid schema types, errors, and warnings.
Errors block rich results. Warnings might not, but they’re risks.
If you used datePublished but formatted it as “January 1st, 2024,” the tool flags it. Google wants ISO format: “2024-01-01T09:00:00+00:00”.
Missing @context? That’s a full error. Google won’t touch it.
The output shows exactly where in your code the issue occurs. You don’t guess — you fix.
Most people miss the context error because their site still displays fine. But for Google, missing context means “skip this.”
3 Mistakes Most People Make
- They validate the home page but ignore product or blog pages
Your homepage might pass, but your articles use a different template. That’s where schema breaks. You need to test every page type.
- They copy-paste schema without checking for dynamic data errors
Say your CMS injects null for aggregateRating when no reviews exist. That’s not valid JSON. The schema fails.
Most people don’t test after publishing — they assume the template works every time.
- They mix JSON-LD and Microdata on the same page
Google supports both, but using both at once creates conflicts. The Schema Checker flags duplicate entities.
Here’s what actually happens: Google picks one, ignores the other, and you lose control over what appears.
If you’re using schema but not testing it weekly, you’re flying blind.
Changes in CMS, plugins, or templates break schema silently.
Fix broken links that can harm crawlability — use the Broken Link Checker alongside this.
If redirects are mangled, Google might not even reach your schema. Check those with the Redirect Chain Checker.
Test your schema today. It’s free, no login needed, and takes less than a minute.
