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Schema.biz

schema.biz

Free plan Web
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Spec score 7.5 #11 of 24 in Schema Markup Tools

What it is

Schema.biz is a free browser toolkit for structured data markup, database schemas, and API specifications. Its markup tools generate, validate, and optimize JSON-LD, Microdata, and RDFa. A visual schema designer exports SQL for PostgreSQL, MySQL, SQLite, and SQL Server; database tools also diagram CREATE TABLE statements, compare schema versions, visualize queries, and offer templates. API tools validate JSON Schema, edit OpenAPI specifications, generate schemas and mock data, convert formats, and detect breaking changes. An AI Search Optimizer checks structured data readiness for ChatGPT Search, Perplexity, and Google AI Overviews. Pasted data is processed in browser JavaScript, and the maker says it is not sent to its servers. For URL-based markup checks, however, the server fetches the requested page for the browser to inspect. The free plan includes all tools without feature gates, limits, or signup. Persistent cross-device work and third-party URL crawling are not offered; an API Validator and Mock Server are marked as coming soon.

Spec sheet

What it does
Schema.biz provides browser-based tools for structured data markup, database schemas, and API specifications.Read 7 Oct 2026 · schema.biz
Security
The privacy policy says the site is served over HTTPS and uses Cloudflare CDN and security services to protect page integrity.Read 7 Oct 2026 · schema.biz
Support
Users can report issues or send feedback to [email protected].Read 7 Oct 2026 · schema.biz
AI search
The AI Search Optimizer evaluates structured data for readiness for ChatGPT Search, Perplexity, and Google AI Overviews.Read 7 Oct 2026 · schema.biz
Analytics and ads
The privacy policy names Cloudflare Web Analytics and Google AdSense, and says ad partners do not access data entered into the tools.Read 7 Oct 2026 · schema.biz
API tools
API tools validate JSON Schema, edit OpenAPI specifications, generate schemas and mock data, convert schema formats, and detect breaking changes.Read 7 Oct 2026 · schema.biz
Database analysis
Database tools can diagram CREATE TABLE statements, compare schema versions, visualize queries, and provide reusable schema templates.Read 7 Oct 2026 · schema.biz
Database design
The visual Schema Designer exports SQL for PostgreSQL, MySQL, SQLite, and SQL Server.Read 7 Oct 2026 · schema.biz
Notable limits
The maker identifies persistent cross-device work and third-party URL crawling as features it does not offer because they require server-side processing.Read 7 Oct 2026 · schema.biz
Planned features
The API page labels an API Validator and Mock Server as coming soon.Read 7 Oct 2026 · schema.biz
Runs locally
The tools process pasted data in browser JavaScript, and the maker says that data entered into tools is not transmitted to its servers.Read 7 Oct 2026 · schema.biz
Structured data
Its markup tools generate, validate, and optimize structured data, including JSON-LD, Microdata, and RDFa.Read 7 Oct 2026 · schema.biz
URL checks
For markup tools that check a URL, Schema.biz's server fetches the requested page for the browser to inspect.Read 7 Oct 2026 · schema.biz
Who it is for
The maker describes its audience as developers and SEO professionals working with structured data, databases, and API specifications.Read 7 Oct 2026 · schema.biz

Plans and prices

Free Free All tools · no premium tiers · no feature gates · no limits · no signup Read 7 Oct 2026 · schema.biz

Every Schema.biz plan and price →

Strong points and limits

Strong points

  • Free access to all tools without signup
  • Markup tools cover JSON-LD, Microdata, and RDFa
  • Database designer exports SQL for four database systems
  • Pasted data processing runs in browser JavaScript

Limits

  • URL-based markup checks require a server fetch
  • Persistent cross-device work is not offered
  • API Validator and Mock Server are coming soon

Who it suits

It suits developers and SEO professionals working with structured data, database schemas, or API specifications. It is less suited to users who need persistent cross-device work or third-party URL crawling.

Verdict

Schema.biz brings markup, database, and API utilities together in a no-cost web toolkit. Note the server-fetch exception for URL checks and the listed missing features.

Where Specifiction places it

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