26 tools in Schema & Structured Data

G

Google Rich Results Test

β˜…β˜…β˜…β˜…Β½ 4.8
Free

Google's own tool for checking whether your structured data qualifies your page for rich results in search, covering star ratings, FAQ accordions, review snippets and more.

URL and code snippet testing Rich result eligibility check Mobile and desktop rendering modes Visual rich result preview
S

Schema Markup Validator

β˜…β˜…β˜…β˜…Β½ 4.7
Free

The official schema.org validator that replaced Google's Structured Data Testing Tool, checking your markup against the full schema.org specification for compliance.

URL, code snippet and file testing Full schema.org vocabulary compliance Error and warning classification JSON-LD, Microdata and RDFa support
G

Google Search Console Enhancements Report

β˜…β˜…β˜…β˜…Β½ 4.7
Free

The Enhancements section in Google Search Console shows which schema types Google has detected on your site and highlights errors or warnings that are preventing rich results.

Schema type detection across your whole site Error and warning breakdown by URL Rich result eligibility tracking Historical data and trend charts
M

Merkle Schema Markup Generator

β˜…β˜…β˜…β˜…Β½ 4.6
Free

The industry favourite for generating clean JSON-LD across a wide range of schema types, with a tabbed interface that makes it quick to get correct markup without touching any code.

JSON-LD output Article schema Event schema FAQ schema
S

Schema App

β˜…β˜…β˜…β˜…Β½ 4.6
Paid

The enterprise standard for structured data management across large, complex websites, used by major publishers and e-commerce brands to deploy and maintain schema at scale.

Templated schema at scale Visual Schema App Editor Google Search Console integration Rich result performance tracking
S

Semrush Site Audit Markup Report

β˜…β˜…β˜…β˜…Β½ 4.6
Paid

Semrush's site audit includes a dedicated Markup report that checks the health of JSON-LD, Microdata and Open Graph tags across your entire site in one crawl.

JSON-LD issue detection Microdata checking Open Graph tag analysis Site-wide crawl coverage
S

Structured Data Testing Tool Chrome Extension

β˜…β˜…β˜…β˜…Β½ 4.5
Free

A browser extension that adds a Validate button to your toolbar, letting you check structured data on any page you visit without leaving your browser or copying URLs into external tools.

One-click schema validation from browser toolbar Schema type detection on any page Error and warning summary No URL copying or tab switching required
C

Classy Schema

β˜…β˜…β˜…β˜…Β½ 4.5
Free

An advanced visual schema builder that lets you construct complex nested structured data without writing JSON-LD by hand, making sophisticated schema requirements more manageable.

Visual nested schema builder Full schema.org type browser JSON-LD output Support for complex multi-type schemas
W

WordLift

β˜…β˜…β˜…β˜…Β½ 4.5
Paid

An AI-driven WordPress plugin that builds a Knowledge Graph from your content, automatically applying entity-based schema to help search engines understand your site's topics and relationships.

AI entity recognition Automatic schema application Knowledge Graph builder Entity linking across content
T

TechnicalSEO.com Schema Markup Generator

β˜…β˜…β˜…β˜…Β½ 4.5
Free

One of the most comprehensive free schema generators available, covering dozens of schema types with clean JSON-LD output and a well-organised interface.

JSON-LD output Dozens of schema types supported Product schema with AggregateRating Software Application schema
C

ContentKing

β˜…β˜…β˜…β˜…Β½ 4.5
Paid

Real-time SEO monitoring that alerts you the moment a schema tag disappears from a page, ensuring you catch structured data regressions before they affect your rich results.

Real-time schema change monitoring Instant alerts on structured data removal JSON-LD and Microdata tracking Broad technical SEO monitoring
B

Bing Webmaster Tools Markup Validator

β˜…β˜…β˜…β˜…Β½ 4.5
Free

Bing's built-in structured data validator checks whether your markup is correctly interpreted for Bing search, which is worth doing if Bing traffic contributes meaningfully to your site.

JSON-LD validation Microdata support Open Graph tag checking URL-based testing