About Schema.biz
Schema.biz builds free, browser-based tools for developers and SEO professionals who work with structured data, database schemas, and API specifications. Every tool on this site runs entirely in your browser — no data is sent to any server, no account is required, and there is nothing to install.
Our Mission
The web runs on schemas. Structured data markup tells search engines what your content means. Database schemas define how your data is stored and related. API schemas describe how services communicate. Despite their importance, the tooling for working with these schemas has historically been fragmented, expensive, or locked behind SaaS subscriptions.
We believe these tools should be free, fast, and private. Schema.biz exists to give every developer — from students building their first project to teams at large organizations — access to professional-grade schema tools without cost, friction, or privacy trade-offs.
100% Client-Side — Your Data Never Leaves Your Browser
Privacy by Architecture
All Schema.biz tools execute JavaScript directly in your browser. Your SQL schemas, JSON-LD markup, API specifications, and any other data you work with never leaves your machine. There is no backend processing, no temporary server storage, and no data collection. You can verify this by inspecting the network tab in your browser's developer tools while using any tool — you will see zero data transmitted to our servers.
What We Offer
Markup Tools
Generate, validate, and optimize structured data markup for search engines. Our JSON-LD Generator supports all major Schema.org types with form-based editing. The Schema Validator checks your markup against Schema.org specs and Google's rich result requirements. Our unique AI Search Optimizer evaluates how well your structured data communicates with AI-powered search engines like ChatGPT Search and Perplexity. The Schema Audit Tool performs a comprehensive audit of all structured data on any page.
Database Tools
Design and analyze relational database schemas visually. The Schema Designer provides a drag-and-drop interface for creating tables and relationships. SQL to Diagram generates ER diagrams from CREATE TABLE statements. Query Visualizer shows how SELECT queries map to your schema. Schema Diff compares schema versions and generates migration scripts. Our Templates library includes 10 production-ready schemas.
API Tools
Build and validate API specifications. The JSON Schema Validator supports all modern drafts. JSON to Schema infers schemas from example data. The Mock Data Generator produces realistic test data from schemas. The Breaking Change Detector compares schema versions and identifies breaking changes.
Learning Resources
Our Learning Hub provides free guides on structured data markup, database design, JSON Schema, API versioning, and AI search optimization — written for developers, by developers.
Contact
Have feedback, found a bug, or want to suggest a new tool? Reach us at hello@schema.biz. We read every message and use your feedback to prioritize what we build next.