How to Check Structured Data: Testing Tools and Methods

To learn how to check structured data on your website, you can either paste your raw markup into an in-browser validator or test your live page against Google's render engine. The fastest way to inspect markup before publishing is to paste your code into a local tool that catches missing fields and syntax issues instantly without pinging search engine crawlers. For pages already live on the web, you can review parsed schemas directly inside your browser's page source or check overall site health in Google Search Console.

Which validation method should you pick?

The right way to inspect schema depends entirely on where the code lives and whether search engines can access it. Different environments require different testing workflows:

Method 1: Check draft markup with an in-browser validator

When you generate schema before adding it to your CMS, running it through a local validator saves time. You can use the free JSON-LD Schema Validator from Links to Wild to paste structured data and get syntax errors, missing required properties, and rich-result eligibility per type, without sending your markup to anybody. Because parsing runs directly inside your browser session, your code remains private.

1. Copy the JSON-LD snippet generated by your CMS, theme, or a tool like our Schema Markup Generator.
2. Open the JSON-LD Schema Validator in your web browser.
3. Paste the raw script tag or bare JSON object into the input field. Alternatively, you can paste the complete HTML document if you want to inspect embedded tags.
4. Review the output list. The parser will flag invalid syntax, broken commas, missing required fields for target types, and rich-result eligibility.

Method 2: Inspect raw code using browser developer tools

You can confirm whether your structured data is actually reaching the user without running any external services. This method works well for verifying static output on live or local staging environments.

1. Open the target webpage in your web browser (such as Chrome, Edge, or Firefox).
2. Right-click anywhere on the page and select View Page Source, or press Ctrl+U (Cmd+Option+U on Mac).
3. Press Ctrl+F to open the search bar and type application/ld+json.
4. Review the contents enclosed within the <script type="application/ld+json"> block to confirm that entity fields like @type, name, and url contain accurate values.
5. If the script is rendered by client-side JavaScript rather than server-side HTML, right-click the page, select Inspect, and look inside the Elements tab under <head> or <body> to check the rendered DOM.

Method 3: Test live pages with Google's tools

Google evaluates structured data according to specific rich result specifications. If your page is accessible on the public web, you can evaluate how Google reads your markup using official developer endpoints provided at Google Developers.

1. Navigate to Google's Rich Results Test tool.
2. Enter the full URL of the live page (for example, https://example.com/blog/sample-post).
3. Click Test URL and wait for Google's crawler to fetch and render the page.
4. Review the detected items list. The tool categorizes findings into valid items, items with warnings, and invalid items with critical errors that prevent rich search snippets.
5. Click on individual detected types to see the exact field triggering an issue in the underlying code.

Method 4: Monitor errors across your domain in Google Search Console

Testing single pages is practical during development, but maintaining an entire site requires continuous monitoring. Google Search Console tracks detected schema across your verified properties automatically.

1. Log in to your Google Search Console dashboard.
2. Look at the left-hand navigation menu under the Enhancements section (labels change based on what Google detects on your site, such as Breadcrumbs, Sitemaps, or Products).
3. Select an enhancement report to see your historical trend of valid versus invalid items.
4. Click on any listed issue to view example URLs that share the same problem, such as a missing author or invalid pricing currency.
5. After updating your templates, click Validate Fix to queue those URLs for recrawling.

If you encounter technical indexing issues while fixing markup across large templates, verifying other baseline technical files with our Canonical Tag Checker or our Robots.txt Tester can help ensure search engine bots access pages cleanly.

Method 5: Check CMS plugin outputs and site templates

Most content management systems rely on SEO plugins or theme hooks to output structured markup. Verifying settings directly inside the CMS prevents errors from repeating across hundreds of posts.

1. Log in to your CMS administrative panel (such as WordPress, Shopify, or Webflow).
2. Open your active SEO plugin or structured data integration settings. In WordPress, look for plugins like Yoast SEO or Rank Math; in Shopify, review your theme liquid files or third-party schema apps.
3. Verify that your site-wide default schema matches your business model (for example, Organization vs. LocalBusiness).
4. Open an individual post or product editor to confirm that page-level overrides (such as Article type, recipe ingredients, or FAQ blocks) are configured properly.
5. Publish a draft preview and inspect the source code as detailed in Method 2 before pushing changes live.

Common structured data mistakes and how to fix them

Validating syntax is only the first hurdle. Many pages have error-free code that still fails to qualify for search enhancements due to structural or policy issues.

• Invisible markup: Schema must reflect content that is visible to human visitors on the page. Adding markup for reviews, prices, or FAQs that do not appear in the page text violates Google search spam policies.
• Trailing commas in JSON-LD: A single trailing comma after the last property in an object invalidates the entire JSON block. Local validators catch this immediately.
• Duplicate Organization declarations: Placing full organization details on every page creates conflicting signals. Place the complete markup on your homepage or about page, give it an @id, and reference that ID from other pages.
• Mismatched canonical URLs: If the url property inside your schema does not match the canonical tag on the page, search engines may ignore the entity. You can check your canonical signals using our Canonical Tag Checker.
• Third-party rating aggregation: You cannot mark up reviews pulled from external third-party sites under an AggregateRating block on your own site. Reviews must be genuine testimonials submitted directly to your platform.

If your website technical markup is verified and you want to expand your organic visibility with managed outreach, review our link building pricing to see how we build high-authority references.

Frequently Asked Questions

Will valid structured data improve my rankings?

Not directly. Google has been consistent that structured data is not a ranking factor. What it does is make you eligible for result types that take up more space and get clicked more, including review stars, prices, product images, and breadcrumbs. The click-through improvement is real, but it is not the same thing as an algorithmic ranking improvement.

Why does Google's Rich Results Test disagree with my validator?

Two likely reasons explain this discrepancy. Google's test fetches and renders the live URL, which means it sees structured data injected dynamically by JavaScript that might not exist in raw source code. Additionally, Google tests eligibility for specific supported rich result types on a live page, whereas an in-browser validator checks the broader syntax and property rules of the code provided. If requirements disagree on a live URL, follow Google's live feedback.

Can I put several types in one block?

Yes, in two ways. An array of objects at the top level is the simplest method. Using @graph is better when entities reference each other, because each node can have an @id that other nodes point at. This structure prevents you from describing your organization repeatedly on a single page.

Is what I paste into an in-browser tool sent anywhere?

No. When using the Links to Wild validator, parsing and checks run directly in your browser session. Nothing is uploaded to external servers. This makes it practical to test markup for draft pages, private staging sites, or internal projects before they launch publicly.