Schema.org Validator
Schema.org Validator: Checks required Schema.org properties, context definitions, and data types.
About this schema.org validator
Schema.org Validator — browser-based utility.
How this tool works
Implements client-side Schema.org Validator operations. Checks required Schema.org properties, context definitions, and data types specifically designed for an seo analyst validates microdata json-ld syntax on an e-commerce product page.
- Schema Ingestion & Meta-Schema Compilation: Loads the target schema and compiles it against the designated JSON Schema draft specification.
- Structural Constraint Resolution: Traverses properties, items, allOf, anyOf, oneOf, and $ref references with recursive loop prevention.
- Evaluation / Mock Synthesis: Validates instance data against compiled constraint functions, or deterministically generates mock values satisfying min/max/pattern rules.
- Diagnostic Reporting: Outputs comprehensive JSON validation error objects detailing failed keyword, schema path, and data path.
Worked example
Scenario: An SEO analyst validates microdata JSON-LD syntax on an e-commerce product page.
Sample input:
Processing: Checks required Schema.org properties, context definitions, and data types.
Illustrative output:
Limits and verification
Safely handles recursive references ($ref: '#') with cycle detection guards to prevent stack overflows. Flags invalid regex patterns within 'pattern' keywords and reports unsupported schema draft versions.
Examples demonstrate an expected workflow; they do not prove every input or every branch of an external specification. Check important results with an independent source before using them for money, security, compliance, safety, or irreversible file changes.
Browser processing boundary
Tool input is processed by code running in the browser and is not intentionally sent to a CZOA processing API. The page can still request ordinary site assets, analytics, or advertising when those services are enabled. Browser extensions and managed-device software remain outside this tool's control.
Relevant references
These references govern or help explain the format, protocol, or calculation used here. Listing a reference does not claim certification or complete implementation of every optional feature.
Content owner: CZOA Tools · Last reviewed: 2026-09-15 · Review methodology
How to use it
- Enter, paste, or select your input data into the Schema.org Validator workspace controls.
- Review available parameter fields, units, formats, or options configured for your task.
- Click the action button or observe immediate live calculations rendered in your browser runtime.
- Inspect the resulting output and any diagnostic messages, then copy or download the result if needed.
Frequently asked questions
What does Schema.org Validator actually validate?+
It parses JSON and reports valid only when @context is exactly https://schema.org and @type is present. It returns the type value and an issues list for either local rule.
What did the Schema.org fixture verify?+
A JSON object containing the exact schema.org context and @type WebSite returned valid true, type WebSite and no issues.
Which schema.org checks are absent?+
It does not validate whether the type exists, whether properties belong to it, cardinality, value formats, nesting, URLs, language, JSON-LD syntax beyond JSON.parse, Google rich-result rules or live page markup.
Does valid true mean rich results will appear?+
No. It only passes two local conditions. Search-engine crawl, rendering, guidelines, data quality, site trust and result presentation require separate evidence.