About Schema.biz
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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.
Who's behind Schema.biz
Schema.biz is run by a small, hands-on team of engineers and SEO practitioners who have spent the last decade shipping software for the kinds of teams you would expect to find on a stack like ours: API platforms, content sites with millions of pages of structured data, and data-heavy back-ends that sit behind both. We started Schema.biz because the gap between "I need this one tool right now" and "sign up for a $99-per-month platform" had widened to the point of absurdity, and because most of the work we do at the structured-data layer is not actually proprietary — it is the same handful of validations and conversions, written for the browser instead of for a server.
Our backgrounds are deliberately mixed. On the engineering side, the team has built TypeScript and Go services in production for years, contributed to open-source schema and validation libraries, and shipped enough JSON-LD into enough CMSes to know exactly which Google rich result requirements actually trigger and which are theoretical. On the SEO side, we have run technical audits for in-house teams and agencies, watched the rise of AI overviews from the inside, and have a strong opinion about which structured data fields move the needle for citation-readiness. The site is the intersection of both sides — tools that pass real validation, written by people who understand both the spec and the search-result page.
We frame the project as a team because the work is genuinely shared: copy, code, design, validation rules, and infrastructure all sit in the same repository, and decisions about what to build next come from feedback we read together. If you want to credit a name, write to the email below and we will reply with one.
How the site is built
Schema.biz is a real engineering project, not an autogenerated content farm. The site is built with Astro 5, with React components mounted on individual tool pages where interactivity is needed (the JSON-LD Generator, the Schema Designer, the JSON Schema Validator). It is statically rendered at build time and deployed to Cloudflare Pages, which serves it from a global CDN. There is no application server, no database, and no backend API for the tools themselves — every transformation, validation, and export runs as JavaScript inside the page you are viewing.
The tooling is opinionated for the same reasons our advice is opinionated. We use Tailwind CSS for styling because it keeps design changes small and reviewable; Ajv for JSON Schema validation because it is the de facto reference implementation; js-yaml for OpenAPI parsing; and a custom SQL parser for the database tools because every off-the-shelf option failed on at least one major dialect. The full stack is described in our public GitHub repository, where the code, dependencies, and build configuration are all visible.
Contact
Have feedback, found a bug, or want to suggest a new tool? You can reach us by email at hello@schema.biz, or by clicking the link below. We read every message and use your feedback to prioritize what we build next.