Best Google Structured Data Testing Tool Alternatives ranked by AI · updated Aug 2026

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Google Structured Data Testing Tool was a browser-based validator for testing Schema.org markup and viewing parsed structured-data items. It was aimed at web developers and SEO professionals, but Google retired it in favor of the Rich Results Test and Schema Markup Validator.

Developer: Google Price: Discontinued; formerly free 🎯 developers.google.com/structured-data/testing-tool

🔍 SEO validation schema markup structured data

Top 6 Google Structured Data Testing Tool alternatives

Google Rich Results Test

Google

💡 Pick it for Google's current, search-focused replacement with rich-result eligibility checks.

Google Rich Results Test checks whether a page's structured data can support eligible Google rich results. It is designed for web developers...

Pros

Officially reflects Google's supported rich-result requirements
Tests both live URLs and pasted code
Provides actionable eligibility errors and warnings

Cons

Does not validate every Schema.org type that has no Google rich result
Less useful for general Schema.org debugging than Schema Markup Validator
Can require publicly accessible URLs for some live-page checks

Free

Alternatives to Google Rich Result... → Visit site

Schema Markup Validator

Schema.org

💡 Pick it when broad Schema.org validation matters more than Google rich-result eligibility.

Schema Markup Validator validates Schema.org structured data in a URL, HTML snippet, or markup fragment. It serves developers and SEO professionals who...

Pros

Maintained by the Schema.org community and focused on the vocabulary itself
Validates many Schema.org types that Google does not turn into rich results
Supports URL and code-snippet testing

Cons

Does not determine eligibility for Google rich results
Provides less Google-specific troubleshooting than Google's Rich Results Test
Does not crawl or monitor an entire website

Free

Alternatives to Schema Markup Vali... → Visit site

Merkle Schema Markup Validator

Merkle

💡 Pick it for a fast, free validator that supports JSON-LD, Microdata, and RDFa.

Merkle Schema Markup Validator is a free browser tool for testing JSON-LD, Microdata, and RDFa structured data. It targets SEO practitioners and...

Pros

Supports multiple structured-data syntaxes rather than only JSON-LD
Useful for quick checks without creating an account
Shows parsed entities and property relationships clearly

Cons

Does not provide Google's complete rich-result eligibility assessment
Lacks the site-wide crawling and reporting of desktop SEO crawlers
Less authoritative for Schema.org vocabulary changes than the Schema.org validator

Free

Alternatives to Merkle Schema Mark... → Visit site

Screaming Frog SEO Spider

💡 Pick it for crawling and auditing structured data across a whole website, not just individual pages.

Screaming Frog SEO Spider is a website crawler that helps you improve onsite SEO by analyzing and auditing technical and onsite SEO...

Licenses start from £149.00 per year

Alternatives to Screaming Frog SEO... → Visit site

Sitebulb

💡 Pick it for prioritized, recurring site audits with clearer reporting than a basic markup validator.

Sitebulb is a website auditing tool that helps users analyze and improve their website's performance and SEO.

$35 - $85 per month

Alternatives to Sitebulb → Visit site

SEMrush Site Audit

💡 Pick it if you need structured-data checks inside a broader, scheduled SEO monitoring platform.

SEMrush offers a site audit tool that helps identify and fix on-page and technical SEO issues.

Pros

Integrated with other SEMrush SEO tools
Competitor analysis and keyword research features

Cons

Less focused on detailed crawling capabilities
Higher starting price for full SEO suite

Starting from $99.95 per month

Alternatives to SEMrush Site Audit →

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