Is the Schema Markup Validator free?

Yes — the Schema Markup Validator is completely free, with no account, subscription, signup, or usage limits.

Is my data uploaded or stored?

No. The Schema Markup Validator processes everything locally in your browser. Your input is never uploaded, saved, or shared with any server.

Does the Schema Markup Validator work offline?

Yes. Once the page has finished loading, the Schema Markup Validator works without an internet connection.

Which browsers does the Schema Markup Validator work in?

The Schema Markup Validator works in all modern browsers, including Chrome, Firefox, Safari, and Edge — no plugins or extensions needed.

Does this validator check schema against Google's Rich Results requirements?

It checks for common required fields and valid JSON syntax. For full Rich Results eligibility testing, also run the schema through Google's official Rich Results Test (search.google.com/test/rich-results).

What is JSON-LD structured data?

JSON-LD (JavaScript Object Notation for Linked Data) is the recommended format for embedding schema.org structured data in web pages. It is placed in a tag in the HTML head.

Schema Markup Validator

Validate and check JSON-LD schema markup for errors and warnings.

JSON-LD Schema (with or without <script> tags)

Free browser-based tool · Runs 100% on your device · Last updated July 7, 2026

What is the Schema Markup Validator?

The free Schema Validator checks any JSON-LD structured data block for syntax errors and common schema.org markup issues. Paste your <script type="application/ld+json"> content into the editor and get an instant validity report — invalid JSON, missing required fields, or unrecognised property names are flagged immediately. Use it before deploying to ensure your schema passes Google's Rich Results Test.

→ Validate JSON-LD structured data before adding it to a web page.
→ Debug a schema block that is failing in Google's Rich Results Test.
→ Verify that a schema generator's output is syntactically correct JSON.
→ Check that required fields (like @type, @context, name) are present in a schema.
→ Quickly review pasted schema markup from a CMS or plugin before publishing.

How to Use the Schema Markup Validator

1 Paste your JSON-LD schema into the editor (the full { "@context": "https://schema.org", ... } block).
2 Validation runs instantly — syntax errors are flagged in red with line numbers.
3 Common issues like missing @context, missing @type, or invalid date formats are also reported.
4 Click Load example to see a sample valid schema for reference.
5 Fix the reported issues and paste the corrected schema back in to re-validate.

Key Features

✅
JSON syntax validation

Detects and reports JSON parse errors with specific line references.
🔍
Schema.org field checks

Warns about missing @context, @type, and other common required properties.
💡
Load example

Insert a sample valid JSON-LD schema to see the expected structure.
🔒
Private & local

Schema data never leaves your browser — all validation is client-side.

Example Usage

Example Input

{
  "@context": "https://schema.org",
  "@type": "FAQPage",
  "mainEntity": [
    {
      "@type": "Question",
      "name": "Is this tool free?",
      "acceptedAnswer": { "@type": "Answer", "text": "Yes." }
    }
  ]
}

Example Output

✅ Valid JSON-LD — no errors found.

Frequently Asked Questions about the Schema Markup Validator

What is the Schema Markup Validator?: The Schema Markup Validator is a free online tool that lets you validate and check JSON-LD schema markup for errors and warnings. It runs entirely in your browser, so there is nothing to install and nothing is uploaded to a server.
Is the Schema Markup Validator free?: Yes — the Schema Markup Validator is completely free, with no account, subscription, signup, or usage limits.
Is my data uploaded or stored?: No. The Schema Markup Validator processes everything locally in your browser. Your input is never uploaded, saved, or shared with any server.
Does the Schema Markup Validator work offline?: Yes. Once the page has finished loading, the Schema Markup Validator works without an internet connection.
Which browsers does the Schema Markup Validator work in?: The Schema Markup Validator works in all modern browsers, including Chrome, Firefox, Safari, and Edge — no plugins or extensions needed.
Does this validator check schema against Google's Rich Results requirements?: It checks for common required fields and valid JSON syntax. For full Rich Results eligibility testing, also run the schema through Google's official Rich Results Test (search.google.com/test/rich-results).
What is JSON-LD structured data?: JSON-LD (JavaScript Object Notation for Linked Data) is the recommended format for embedding schema.org structured data in web pages. It is placed in a <script type="application/ld+json"> tag in the HTML head.