Schema.biz

What Schema.biz is

Schema.biz is a web-based collection of tools for structured data markup, database schemas, and API specifications. Its markup tools generate, validate, and optimize JSON-LD, Microdata, and RDFa. For database work, the visual Schema Designer exports SQL for PostgreSQL, MySQL, SQLite, and SQL Server; other tools can diagram CREATE TABLE statements, compare schema versions, visualize queries, and use schema templates. API tools handle JSON Schema validation, OpenAPI editing, schema and mock-data generation, format conversion, and breaking-change detection. An AI Search Optimizer evaluates structured data readiness for ChatGPT Search, Perplexity, and Google AI Overviews. The tools process pasted data in browser JavaScript, and the maker says that data entered into them 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 with no feature gates, usage limits, or signup requirement. The service is aimed at developers and SEO professionals.