SerpCraft

JSON-LD Toolkit

Build and validate JSON-LD structured data.

Visual StudioRelease DiffRegression CheckStaging CheckSEO CheckerURL Debuggerllms.txtHreflangOG ImageSocial MetaJSON-LDSchema MarkupSocial PreviewSERP PreviewRobots.txt

JSON-LD Validator

Paste JSON-LD structured data and get instant feedback on syntax, required fields, and rich-result eligibility — the same engine that powers the studio and the URL Debugger, so the verdict is always consistent.

A JSON-LD toolkit that combines a visual generator and a validator in one place: build structured data for Article, BlogPosting, Product, FAQPage, Organization, BreadcrumbList, WebSite, and LocalBusiness schema types — then paste it in to check syntax, required schema.org fields, and rich-result eligibility in real time, using the same validation engine as the SerpCraft studio and URL Debugger.

What is JSON-LD?

JSON-LD (JavaScript Object Notation for Linked Data) is Google's recommended format for structured data. It is a JavaScript block placed in your page's <head> that tells search engines what your page is about — an article, a product, a FAQ, a local business — in a machine-readable format. This can earn rich results in search, like star ratings, FAQ accordions, breadcrumb trails, and event details.

JSON-LD vs Microdata vs RDFa

Google supports three formats for structured data: JSON-LD, Microdata, and RDFa. JSON-LD is strongly recommended — it is a separate script block that does not clutter your HTML, is easy to generate and validate, and is what Google's own tools default to. Microdata and RDFa require adding attributes throughout your HTML, which is harder to maintain.

Which schema type should I use?

Article or BlogPosting for articles and blog posts. Product for things you sell. FAQPage for FAQ sections. Organization for your company (usually on the homepage or about page). BreadcrumbList for navigation breadcrumbs. WebSite for your site as a whole (usually on the homepage). LocalBusiness for physical business locations. Use the dropdown to switch between types.

Syntax is the easy part — required fields are the hard part

Most validators stop at JSON.parse: if the JSON parses, they say valid. But Google ignores a FAQPage without mainEntity, a Product without image, an Article without datePublished. The validator enforces the required fields for the most common schema types, so a passing result means deployable, not just parseable.

One engine, consistent verdicts

The validator runs the same code as the studio's live schema feedback and the URL Debugger's structured-data checks. That matters: a schema that passes here will pass the audit, and a schema flagged here will never surprise you in the debugger. There is one source of truth, not three tools with three opinions.

Frequently Asked Questions

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Fixing a known problem?

Why Does Google Show the Wrong Meta Description?Your OG Image Is Not Showing When You Share a LinkCanonical and noindex on the Same Page: a Signal ConflictSchema Passes Validation but Google Shows No Rich ResultsGoogle Sees Different HTML Than Your Browser Does