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HomeSEOSchema Validator

Schema Validator

Validate JSON-LD syntax and local schema hints. Free, private, runs in your browser.

100% private — your files and text never leave your browser. All processing happens locally on your device.

Paste JSON-LD above to validate it locally.

You might also need

Schema Markup GeneratorGenerate JSON-LD schema markup locally
JSON Schema ValidatorValidate JSON data against local schemas
SERP Snippet PreviewPreview local search title and description snippets
Canonical Tag GeneratorCreate canonical link tags from absolute URLs

Check JSON-LD You Already Have

Schema Validator accepts raw JSON-LD or an application/ld+json script tag, parses it locally, and reports syntax problems plus common schema.org field warnings for popular structured data types.

Not Google Rich Results

This validator does not call Google Rich Results, Search Console, live URL inspection, or a remote structured data API. It is a private syntax and local-rule pass before you use external testing where needed.

Useful Publishing Warnings

Warnings cover missing @context, missing @type, and recommended fields for Article, Product, FAQPage, BreadcrumbList, WebSite, and LocalBusiness. They are prompts for review, not guarantees of search eligibility.

FAQ

Is this Google Rich Results testing?

No. It parses JSON-LD and checks local schema.org-style rules. It does not call Google tools, Search Console, or a live URL validator.

Can I paste a script tag?

Yes. The tool extracts application/ld+json from a script tag and validates the JSON-LD payload.

What does it warn about?

It flags invalid JSON, missing @type or @context, and common recommended fields for Article, Product, FAQPage, BreadcrumbList, WebSite, and LocalBusiness.

Does my markup upload?

No. The markup stays in the current browser tab and can be copied or downloaded as a report.

Can it validate live pages?

No. Live URL validation would require fetching pages remotely and is outside Convertful's local-first scope.