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Schema Markup Validator

Validate JSON-LD syntax, check @context and @type requirements, and inspect required attributes safely in your browser.

Overview & Mechanics

How the Schema Markup Validator Works

The Schema Markup Validator inspects JSON-LD structured data snippets directly in your browser. It identifies misplaced syntax characters, verifies schema.org context compliance, checks entity types, and audits required properties without executing any untrusted code.

Step-by-Step Tutorial

How to Use This Tool in Simple Steps

01

Paste your raw JSON-LD code or full `<script type='application/ld+json'>` block into the editor.

02

Click Validate Schema to initiate immediate parsing.

03

Inspect the diagnostic results breakdown displaying syntax status, detected schema types, errors, and recommendations.

Mathematical Logic

Formulas & Computational Methodology

The validator safely parses input text using non-executable JSON parsing with line-error capture. It validates the presence of `@context: 'https://schema.org'` and verifies that root and nested `@type` properties conform to documented schema definitions, verifying key properties like `headline` on Articles and `name` on Organizations.
Case Study Scenario

Real-World Walkthrough

Pasting a snippet containing a trailing comma before a closing bracket instantly highlights the syntax error with line context, preventing the structured data from breaking in search engine crawlers.
Important Caveats

Limitations & Assumptions

  • Designed as an immediate client-side debugging utility; it complements but does not replace Google's official Rich Results Test tool.
  • Security-first architecture: strictly parses JSON data without ever evaluating JavaScript expressions.
Common Questions

Frequently Asked Questions

Trailing commas after the last property, unescaped quotation marks inside text strings, and forgetting the `@context: 'https://schema.org'` header cause over 80% of JSON-LD syntax failures.

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