Structured Data Validator

Deep Audit

Paste JSON-LD, inspect the entity tree, and catch missing required fields before deploying schema to production.

✓ Local Validation✓ Entity Tree Mapping✓ 0ms Latency✓ 100% Client-Side

Load Preset Sample:

input_schema.json

validation_report.txt

No JSON-LD loaded

Try a sample schema to see the entity tree, missing fields, and warnings.

What is structured data validation?

Structured data validation checks whether your JSON-LD is syntactically valid and whether the required schema fields are present for the type you are publishing. It helps catch missing names, malformed arrays, and incomplete offer or author blocks before search engines crawl the page.

Who should use it

Use this validator when you publish FAQ, Article, Organization, LocalBusiness, or Product markup. It is especially useful for technical SEO teams, developers, and agencies that want a fast check before pushing schema into production.

Examples

FAQPage validation

Example Input

{ "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What is PenGenie?", "acceptedAnswer": { "@type": "Answer", "text": "A developer and technical SEO utility hub." } } ] }

Sample Output

Validation passes with FAQPage, Question, and Answer nodes present.

Article validation

Example Input

{ "@context": "https://schema.org", "@type": "Article", "headline": "Technical SEO Toolkit", "author": { "@type": "Person", "name": "PenGenie" }, "publisher": { "@type": "Organization", "name": "PenGenie" }, "datePublished": "2026-06-05" }

Sample Output

Validation flags only the properties that are missing or malformed.

How to get better output

Paste the raw JSON-LD script or the JSON object content into the validator. Start with a single schema block, keep required fields visible, and fix every error before deploying. The tree view helps you inspect the nesting of each entity quickly.

FAQ

Does this validator support every schema type?

Not in v1. It focuses on the most common technical SEO schema types: FAQPage, Article, Organization, LocalBusiness, and Product.

Can I paste the entire script tag?

Paste the JSON content itself. The validator is built to check JSON-LD structure and property presence, not HTML script wrapper formatting.

What should I fix first when the validator shows errors?

Fix missing required fields first, then verify nesting, then check that the JSON-LD matches the page content shown to users.

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