Structured Data Tools: 8 Tools Compared (2026)
Schema generation, validation and management tools including Rank Math, Yoast SEO and aeo.js, helping sites add JSON-LD, llms.txt and Speakable to improve AI-engine recognition.
This curated list compares 8 structured data tools tools — including Geordy.ai, Schema App, Google Rich Results Test — by features, free plans, pricing and API support, so you can shortlist the right stack in minutes.
Geordy.ai
A GEO-focused automated JSON-LD platform with llms.txt generation that helps sites quickly adapt to AI engines and improve visibility via structured-data markup.
Schema App
An enterprise Schema.org management platform supporting complex knowledge-graph building, deployment and tracking to manage structured-data markup site-wide.
Google Rich Results Test
The official free Schema validator that checks FAQ, HowTo, Article and Product markup to ensure structured data meets Google rich-results and AI Overviews requirements.
Schema Markup Generator
An online Schema code generator — no coding needed; fill a form to produce Schema.org-compliant JSON-LD for common types like FAQ, Article, Organization and Product.
Rank Math
A WordPress AEO plugin that auto-generates FAQ, HowTo and Article Schema with AI Overviews optimization — a powerful free tier makes it a top pick for WordPress AEO.
Yoast SEO
The most popular WordPress SEO plugin, with built-in Schema that adds Article, BreadcrumbList and Organization data automatically — a classic AEO infrastructure tool.
aeo.js
An AEO npm package for modern web frameworks that one-click generates llms.txt, robots.txt, sitemaps and JSON-LD, supporting Next.js, Nuxt, Astro and Vite for fast AI-crawler compliance.
AEO Schema Skill
A Claude-focused Schema.org JSON-LD markup skill covering Google rich results and AEO answer-engine optimization, including entity graphs, Speakable and sameAs strategy, for Claude.ai, Claude Code and Cursor.