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Ubify Technical SEO & Webmaster Team
SEARCH ENGINE OPTIMIZATION AUDITORS
About This Tool
The JSON-LD Schema Markup Validator provides an instant in-browser syntax inspection utility for web developers, SEO specialists, and technical webmasters auditing structured data snippets.
### Syntax Validation Logic & Rules The validator processes pasted structured data blocks directly inside client-side JavaScript: 1. JSON Syntax Parsing: Executes native `JSON.parse()` to detect malformed commas, unescaped quotes, or mismatched braces. If parsing fails, the tool flags `Invalid JSON-LD`. 2. Required Type Verification: Verifies that the top-level JSON object contains the essential `@type` property defined by Schema.org specifications (such as `Article`, `FAQPage`, `Product`, or `Organization`). If absent, it alerts `Missing @type property`. 3. Pretty-Print Formatting: If both criteria pass, the tool returns `Valid Schema\nType: [Detected Type]` accompanied by cleanly formatted, 2-space indented JSON structure.
### Scope and Validation Limits This tool provides rapid syntax parsing and validates the existence of the root `@type` declaration. It does not validate nested property hierarchies against Schema.org vocabulary schemas or resolve external `@context` URLs over the network.
### Worked Validation Example - Input Snippet: ```json { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{ "@type": "Question", "name": "How fast is in-browser schema validation?", "acceptedAnswer": { "@type": "Answer", "text": "Validation completes in milliseconds locally." } }] } ``` - Output Result: - Header: `Valid Schema` - Identified Type: `FAQPage` - Indented structured object with normalized whitespace.
### 100% Private Client-Side Processing Structured data snippets often contain unpublished landing page URLs, staging metadata, or proprietary product schema. All parsing runs exclusively in your browser without transmitting code to external servers.
How to Use
- 1
Paste your raw JSON-LD schema snippet into the text area.
- 2
The validator immediately executes native JSON parsing upon text entry.
- 3
Check whether the snippet produces "Valid Schema", "Missing @type property", or "Invalid JSON-LD".
- 4
Copy the reformatted, pretty-printed JSON structure directly into your web templates.
Frequently Asked Questions
Why is the @type property mandatory in Schema.org JSON-LD?
Search engines require @type to identify the entity being described, such as an Organization, Recipe, Event, or NewsArticle, in order to render rich SERP snippets.
Does this validator connect to Schema.org servers to check properties?
No. This tool runs 100% locally in your browser, parsing JSON syntax and checking for top-level @type without external API calls.
Can I validate JSON-LD enclosed inside HTML <script> tags?
Extract the JSON contents from between the <script type="application/ld+json"> and </script> tags before pasting into the validator.